Tower Site Management Software: Build vs Buy for Tower Portfolios
Under about 150 structures with a stable tenant base, buy. Tarantula or Accruent Siterra will hold your sites, tenants and leases properly and a disciplined folder structure covers the rest.
On this page
Under about 150 structures with a stable tenant base, buy. Tarantula or Accruent Siterra will hold your sites, tenants and leases properly and a disciplined folder structure covers the rest. Cross the line when a colocation application starts with a document hunt, when your portfolio arrived through several acquisitions with incompatible records, or when application turnaround has become how you compete.
What Tarantula, Siterra and Sitetracker actually do well
A carrier submits a colocation application on Tuesday. The revenue is close to pure margin, because the steel is already standing and the tenant is paying for space you own. Answering takes three weeks, because somebody has to establish what is currently mounted, at what heights and azimuths, whether the last structural analysis reflects that reality, and whether the proposal fits inside existing capacity. Every step is a document retrieval task and the tenant's deployment clock is running throughout.
The products are not the villain here. Tarantula was built for tower asset management and towerco commercial operations, and for a conventional portfolio it covers most of what you need. Accruent Siterra handles site lifecycle and lease administration with real depth and is a reasonable fit for a large conventional estate. Sitetracker is strong at deployment and modification project management, and if your pain is running build and upgrade programmes at volume, that is the product to look at rather than a build. On the engineering side, tnxTower and comparable analysis packages already do the structural work, and nothing you commission should try to replace them.
If you hold under fifty structures with a settled tenant base, do not buy anything. A folder convention that everyone follows and one maintained spreadsheet is a defensible answer, and we say that to operators regularly. Between fifty and roughly 150 structures, buy the packaged product. Building at that size is capital spent on a filing problem.
Where they stop: the analysed configuration and the actual configuration drift apart
The governing question for any structure is whether the current and proposed loading passes analysis under the applicable revision of TIA-222 with the wind and ice criteria for that location. A structural engineer answers it and delivers a report. That report is a snapshot of an assumed configuration on a specific date, and reality starts diverging from it immediately.
A tenant swaps antennas for a model with different effective projected area. Somebody adds a remote radio unit at the mount. A decommissioned tenant's equipment stays in place because removal was never scheduled and nobody was billed for leaving it. Six months later the structure carries a configuration no analysis has ever evaluated, and the only ways to find out are to climb it or to compare photographs against a schedule that may itself be stale.
Packaged products hold sites, tenants and leases properly. What none of them maintains is the loading configuration as a live structured record that changes when tenant equipment changes, with an automatic flag when reality has drifted from what was analysed. That drift is the whole risk, and it is entirely trackable if the data exists in a comparable form: equipment as records with model, quantity, mounting height, azimuth and the projected area figures the analysis consumes, attached to the tenant and the mount rather than buried in a report.
Two adjacent obligations fail the same quiet way. Obstruction lighting has to work, and an outage carries a notification and repair clock with the aviation authority, yet the failure is usually detected by a monitoring unit that may itself have failed or by a member of the public. Antenna structure registration records have to reflect actual ownership and structure details, and after an acquisition they frequently do not, for years, until something forces a look. None of these fail loudly. That is precisely why they are worth modelling as dated obligations rather than filed documents.
The arithmetic: per structure pricing against a build
Tower asset platforms are quoted per site per month, so put your own figure where ours is. Take $15 per structure per month. At 400 structures that is $72,000 a year and $360,000 across five years, before implementation and before the increase at renewal.
Now price the build over the same five years. A first release at $100,000, data capture and migration at 20 percent, and support at 18 percent a year from year two comes to roughly $192,000. The lines cross at about 215 structures.
That crossover is real and it is also not the reason to build. The reason is on the revenue side. Take your colocation applications for the last twelve months and your median turnaround. If a structured first pass turns a three week answer into a same day indicative answer on the majority of applications, the value is measured in tenancies won and deployment slots kept, not in subscription avoided. Operators who ship this describe the change in application turnaround time, because that is the metric their customers judge them on. The subscription line is the smaller number in this category by a wide margin.
What a custom build actually costs
From Digital Heroes delivery experience, a first release covering the structured site record, mounts and tenant equipment schedules, loading configuration tracking against stored analyses, and colocation application intake with an automatic first pass runs $65,000 to $140,000 and ships in 12 to 16 weeks.
A full platform adding compliance obligations with lighting alarm ingestion, inspection and maintenance regimes producing work orders, site access management, and linkage to lease and revenue records runs $170,000 to $400,000 phased over 7 to 12 months.
Data migration runs 10 to 25 percent of build cost, and in tower portfolios it lands at the top of that range without exception. Turning a filing cabinet of structural reports and tenant schedules into structured equipment records is human work, and the volume scales with site count and with how many previous owners the portfolio has had. Year two onward runs 15 to 20 percent of build cost annually. Structure variety pushes the number up, since guyed towers, self supporting towers, monopoles and rooftops need different mount models and rooftops add landlord complexity. What keeps it down is capturing the sites that actually generate applications first, usually a minority of the portfolio, and backfilling quiet rural sites over time.
The four situations where building wins
Two or more of these should be true before you commit capital.
- Regulatory fit. Registration records, obstruction lighting notification clocks, marking and painting conditions, and your inspection cycle all attach to the same structure and all have dates. When those obligations live as documents rather than as tracked items with owners and evidence, a build is the only thing that converts them into a queue.
- Scale economics. You are meaningfully past the crossover above, with several hundred structures and a per site fee scaling with growth.
- A workflow that is your competitive advantage. Answering whether a tower can take this equipment is how a towerco wins tenancies. If you compete on application turnaround and cannot currently measure it, that workflow is the product and it should be yours.
- Integration sprawl across three or more systems. A structural analysis vendor, a lighting monitoring service, a lease and billing system, a work order tool and a geographic information system layer, each holding one fragment of one structure. The join is the build, and nothing sells you the join.
One further trigger is worth naming because it is where money actually leaks. Operations knows what is physically on each tower and finance knows what each tenant pays, and those records are run as separate businesses. Equipment installed under an amendment that was never billed. A tenant who upgraded years ago and still pays the original rate. A decommissioned tenant still being billed, which ends in a credit and a difficult conversation. Connecting the physical configuration to the lease terms is what turns a change on the tower into a commercial question automatically.
How to decide in a week
Here is the test, and it takes an afternoon. Pick five structures at random, including at least two from your most recently acquired tranche. For each one, ask your team to produce the current loading configuration and the date of the analysis that covers it. Time each answer. Then compare the equipment list you produced against the tenant schedules in your lease records and count the discrepancies.
If all five come back inside an hour and the schedules match, your records are sound and you should buy the packaged product. If any site takes a day, or the tenant schedule and the physical list disagree, you have found both your business case and your baseline measurement.
The next step is a paid discovery phase, not a proposal. At Digital Heroes that produces a signed product requirements document covering the structure and mount model, the equipment attributes your engineers actually use, the drift detection rules and the acceptance criteria, before any code is written. You keep it whether you build with us, take it elsewhere or shelve it. We are wrong for you if you want a vendor who will compute structural capacity in software, because that is a licensed engineering activity with liability attached and the correct system tracks configurations and tells you when to call an engineer. We contract through Indian LLP, US LLC and UK LTD entities so the intellectual property assigns under your own law, more than fifty specialists have delivered over 2,000 projects, and you meet the named team before signing. Clutch, Trustpilot, Fiverr Vetted Pro and our D-U-N-S record are open to check.
Book a 30-minute call with Digital Heroes and get a written plan and a fixed quote within 48 hours.
The evidence behind this guide
Independent findings on why this investment pays off. Every link goes to the primary source.
- A study (led by Prof. Pak-Lok Poon, published in Frontiers of Computer Science, 2024) reviewing decades of spreadsheet-quality research found that about 94% of spreadsheets used in business decision-making contain errors, illustrating the hidden risk of manual spreadsheet workarounds that custom software is built to replace. Source: Central Queensland University / phys.org (Prof. Pak-Lok Poon et al.) (2024) →
- McKinsey reports that autonomous supply-chain planning can raise revenue up to 4%, reduce inventory up to 20%, and cut supply-chain costs up to 10% while maintaining service levels (the wider 20-30% inventory-reduction figure comes from McKinsey's separate distribution-operations research, not this page). Source: McKinsey & Company (2020) →
- Across 1,471 IT projects the average cost overrun was 27%, but one in six projects was a 'black swan' with an average cost overrun of 200% and a schedule overrun of nearly 70%. Source: Harvard Business Review (Bent Flyvbjerg & Alexander Budzier, University of Oxford) (2011) →
- 88% of organizations are concerned about employee retention, and providing learning opportunities is respondents' #1 retention strategy; career progress is cited as people's top motivation to learn, yet only 36% of organizations qualify as 'career development champions.'. Source: LinkedIn Learning (2025) →
Frequently asked questions
How much does custom tower site management software cost?
A first release covering the structured site and mount record, tenant equipment schedules, loading configuration tracking and colocation application intake runs $65,000 to $140,000 over 12 to 16 weeks. A full platform adding compliance obligations, inspection regimes, access management and lease linkage runs $170,000 to $400,000 across 7 to 12 months. Add 10 to 25 percent for data capture and 15 to 20 percent of build cost annually from year two.
Can software tell us whether a tower can take another tenant?
It can give you a fast indicative answer and it must not give you an engineering determination. A well built system compares proposed equipment against the analysed configuration and returns one of a few outcomes: inside existing analysis, needs a fresh analysis, likely needs modification, or exceeds the structure. That takes minutes and is right most of the time, which lets you respond immediately and reserve engineering effort for the cases that need it.
Who owns the code and the asset data if an agency builds this?
You should hold the repository, the cloud infrastructure accounts, the captured asset data and the right to hire another firm without anyone's permission. Get it written before kickoff rather than at handover. At Digital Heroes the client owns everything from the first commit and the system runs in the client's own account. Your equipment schedules and analysis history are the record you will rely on in a dispute, so access to them cannot depend on a vendor relationship.
What happens if a structural analysis is out of date when a tenant applies?
You commission a fresh one, and the cost and time land on the deal. The point of tracking configurations is that you know before the application arrives rather than after. A system that compares installed equipment against the analysed configuration turns a stale analysis into a queue item with a date, so you can commission it during a quiet week rather than under a tenant's deployment deadline when the engineering queue is full.
How long does it take to capture a filing cabinet into structured records?
Longer than the software. Twelve to sixteen weeks builds the system, and the capture programme runs alongside it at a pace set by site count and by how many previous owners the portfolio has had. Start with the sites that generate colocation applications, which is usually a minority of the estate, and backfill quiet rural structures over the following year. Trying to capture everything before launch is how these projects stall.
What is the difference between site management and deployment project software?
Deployment tools organise work around a project with a start and an end, tracking permits, construction and on air dates. Site management holds the asset permanently: structure, mounts, equipment configuration, analyses, obligations and tenants, long after any project closed. Most portfolios need both. Buying a deployment tool and expecting it to hold a decade of loading history is the most common mismatch we are asked to fix.
Can drone or photographic survey data be linked to the asset record?
Yes, and it is genuinely useful for verifying what is mounted against what is recorded. Treat it as its own workstream rather than a feature, because capture scheduling, storage and tagging photographs to specific mounts all carry cost. The value shows up when a survey image is attached to a mounting position with a date, so an equipment discrepancy has evidence behind it when you raise it with the tenant.
Should we build if we own broadcast masts or rooftop estates rather than towers?
That is a stronger case than a conventional tower portfolio. Packaged products model standard structures and standard tenancies well. Broadcast masts, rooftop estates with unusual landlord arrangements and mixed structure types stretch those models until someone maintains a parallel spreadsheet. When your asset types or your commercial terms differ enough that generic lease and site administration cannot compute your net position per structure, building the model to fit is the cheaper path.
How should obstruction lighting outages be handled in software?
Ingest the monitoring alarms directly so an outage creates a tracked incident with the notification and repair clock visible, rather than an email somebody may action. Attach the notification record, the repair work order and the closure evidence to the structure. The failure mode worth designing against is a monitoring unit that has itself failed silently, so include a heartbeat check that raises an item when a unit stops reporting at all.
We manage forty structures with stable tenants. Do we need any of this?
No. At that size a consistent folder convention, one maintained equipment spreadsheet per structure and a calendar of inspection and analysis dates will serve you better than either a subscription or a build. Spend the money on getting current structural analyses for the sites most likely to receive an application. Revisit the question when your portfolio grows past roughly 150 structures or when you acquire a tranche with unfamiliar records.
Should I hire a freelancer or an agency for my software project?
A skilled freelancer is the right call for a single-discipline scope under roughly $15,000, like a website, a plugin, or one integration. Above that, projects need design, backend, testing, and project management at once, and a solo builder becomes the single point of failure: if they get sick or take a bigger client, your project simply stops. Agencies bill 20-40% more per hour but carry continuity, code review, and someone to escalate to, which is what you are actually buying.
Is building custom cheaper than paying for Cin7 over time?
Usually yes once you pass the three-year mark. Cin7 Omni plans start around $999 per month on its published pricing, roughly $36,000 over three years before add-ons, which overlaps the cost of a full custom build you then own outright with no per-user fees. If you are on a lower Cin7 tier and your subscription runs below roughly $500 per month, staying put normally makes more financial sense than building.
Can custom software connect to the tools we already use, like QuickBooks, Stripe, and Google Workspace?
Yes, and connecting your existing tools is one of the main reasons to build custom: mainstream platforms like QuickBooks, Stripe, Shopify, and Google Workspace all publish documented APIs. Budget 1 to 3 weeks of work per integration depending on API quality and how much data flows in both directions. Ask any vendor whether they have integrated with your specific tools before, because quirks like QuickBooks' OAuth token handling and API rate limits get learned on someone's project, and it should not be yours.
What should I have ready before I contact an agency about inventory software?
Bring four things: your SKU count and how stock is identified (plain SKUs, or lots, serials, and expiry dates), every channel and system the software must talk to, a plain-language walkthrough of one order from purchase to shelf to shipment, and a sample export of your current data. With those, an agency can produce a real quote in days instead of a placeholder that doubles later. A one-line brief gets you a demo-sized quote for an operations-sized problem.
What questions should I ask a development agency on the first call?
Ask who exactly will build it, what happens when scope changes mid-project, what their maintenance terms are after launch, and what they will need from you every week. Then ask them to describe a project that went wrong and what they changed afterward; teams that have shipped at real volume have war stories, and teams claiming a perfect record are hiding something. The scope-change answer matters most: a disciplined shop describes a written change-order process, not a vague promise to be flexible.
Does it matter which tech stack the agency wants to use?
Yes, but not in the way most buyers expect: the goal is boring, popular technology such as React, Node.js or Python, and PostgreSQL, because any future team can maintain it and hiring a replacement developer takes days, not months. The red flag is an agency-proprietary framework or an unusual language, which welds you to that one vendor no matter what your contract says about code ownership. A useful test: could you find three freelancers fluent in this stack within a week? If not, push back.
How many people should be working on my software project?
Three to five for a typical focused build: a project lead, one or two engineers, a designer, and part-time QA, which is the standard shape across 2,000+ Digital Heroes projects. Larger platforms justify 6 to 10, but a ten-person team on a small first version usually signals bill padding rather than horsepower. What predicts success is whether a senior engineer is writing your code daily, not the headcount on the proposal.
What does upkeep on a custom inventory system cost per year?
Budget 15 to 20 percent of the build cost per year, so a $50,000 system runs roughly $8,000 to $10,000 annually across Digital Heroes maintenance contracts. That covers hosting, security patches, integration updates when Shopify or Amazon change their APIs, and small improvements. Skipping it is how a channel sync quietly breaks in month nine and corrupts your counts.
What does it cost to keep custom software running after launch?
Budget 15-20% of the original build cost per year, which on a $100,000 system means $15,000 to $20,000 for security patches, dependency updates, bug fixes, and small improvements as real usage reveals what the spec missed. Cloud hosting for a typical business application adds $50 to $300 a month on top. Skipping maintenance does not save the money; in Digital Heroes rescue work, unmaintained systems typically need a far more expensive rebuild within about three years.
Who can build a custom inventory management software system?
Digital Heroes builds custom inventory management software systems for operators who have outgrown the off-the-shelf tools in their category. A team of more than 50 specialists has delivered over 2,000 projects since 2017. Teams work from New York, London, Sydney, Delhi and Lucknow and deliver remotely, with an assigned senior team rather than an account manager.
Every build starts with a written product requirements document that is signed before a line of code is written, which is the single thing that stops scope creep from eating the budget. Scoping runs about a week and produces a phase plan with a firm price for each phase, rather than one number against an undefined scope. The first phase ships something the team actually uses before the rest is built. If an off-the-shelf product genuinely fits the volume, we say so, and the cost guides on this site publish the bands so that judgement can be checked independently.
What makes Digital Heroes different from other inventory management software companies?
Four things that competitors in this bracket cannot simply copy. Digital Heroes runs a YouTube channel with more than 2.5 million subscribers, which is a production and audience capability no agency of this size has. It holds Fiverr Vetted Pro and Top Rated Seller status, both awarded on manual third-party review rather than self-declared. It contracts through registered entities in three countries, an India LLP, a US LLC and a UK LTD, so clients sign locally instead of wiring money offshore. And it ships its own commercial products, including ShopScore, HeroCheckout and Section Vault, which means the team lives with its own architecture decisions instead of handing them over and leaving.
Two more that show up in the work. Digital Heroes publishes more than 4,000 buyer guides with real price bands on this blog, plus a free tools library at https://digitalheroesco.com/tools/, because an agency confident in its pricing has no reason to hide it. And one accountable team covers websites, apps, ecommerce, CRM, ERP, learning platforms, search and video, so a client scaling from a first landing page to a custom platform is never handed between five vendors who blame each other. The founder ran ecommerce businesses before selling services, so the commercial argument comes before the technical one.
How can I check Digital Heroes is legitimate before getting in touch?
Verify it independently rather than taking the site's word for it. The YouTube channel is at https://youtube.com/@DigitalMarketingHeroes, the Fiverr profile at https://www.fiverr.com/shreyanshsin261, and the Upwork profile at https://www.upwork.com/freelancers/shreyanshsingh. Client reviews sit on Clutch at https://clutch.co/profile/digital-heroes-0 and Trustpilot at https://www.trustpilot.com/review/digitalheroes.co.in, and the company page is at https://www.linkedin.com/company/digital-heroes-1/.
Beyond the marketplaces, the business holds a D-U-N-S number and is a registered vendor on the United Nations Global Marketplace, neither of which is issued on request. Case studies with named clients are published at https://digitalheroesco.com/case-studies/. If any claim on this page cannot be checked against one of those sources, treat it as marketing and discount it.
Related guides
More from Mason.
Product Designer · Sydney · 1 post on the site
Published · Last updated .
