Tower Site Lease Management Software: Custom Build vs Off the Shelf
Under about 500 site agreements, buy. Sitetracker or Tarantula will hold your leases, your renewals and your deployment programme for a fraction of a build, and your real problem at that size is process rather than software.
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Under about 500 site agreements, buy. Sitetracker or Tarantula will hold your leases, your renewals and your deployment programme for a fraction of a build, and your real problem at that size is process rather than software. Build when your portfolio came together through acquisitions with incompatible records, when colocation revenue reaches finance by email, or when a lease audit found material ghost rent.
What Sitetracker, Siterra and Tarantula actually do well
A carrier decommissioned a rooftop in 2021. The equipment came off, the project closed, and nobody sent the termination notice inside the window the ground lease required. The term renewed, the payment file kept running, and a lease audit found it three and a half years later. That story is why people search for this, and it is worth saying up front that the products are not what failed.
Sitetracker is a strong deployment programme tool and will run a rollout across thousands of sites properly. Accruent Siterra has deep site lifecycle heritage and handles conventional lease administration for a large portfolio. Tarantula was built for tower portfolios and understands the colocation model rather than guessing at it. On the pure lease accounting side, Visual Lease, CoStar Real Estate Manager and FinQuery exist to produce a defensible ASC 842 and IFRS 16 position, and they do that better than anything you would write.
If you hold fewer than roughly 500 agreements, or your dominant pain is running a build programme rather than lease economics, buy the product that matches that shape and stop reading the rest of this as a shopping list. We tell operators this regularly and it costs us work. A build at 300 sites is a way of turning a staffing problem into a software problem, and it does not survive contact with the abstraction backlog.
Where they stop: a project ends and an obligation does not
The specific mismatch is structural. Deployment systems are organised around a project, which has a start, a finish and a team that disbands. A site agreement is perpetual, and its obligations run for decades after the construction manager moved on. That gap produces four leaks, and they are the same four in every portfolio audit.
- Ghost rent. Rent still paid on decommissioned sites, because nothing connected the decommission to the payment file and the notice window in the clause was measured in months before an anniversary.
- Escalations applied from an interpretation. A payment engine with a percentage field is wrong on a large share of any real portfolio, because escalators come as fixed steps, five year anniversaries, index linked clauses tied to a named Consumer Price Index series with a stated base month, and greater of a fixed rate or the index change with a floor and a cap.
- Colocation and revenue share never invoiced. The billing trigger sits at the end of a chain owned by engineering: radio frequency request, structural analysis, permit, notice to proceed, amendment. It reaches finance by email if it reaches finance at all.
- Duplicate payees. An assignment creates a second payee record, and both get paid. Fraudulent change of payee letters exploit exactly the same manual process.
Underneath all four is one fact: the agreement lives in a scanned document and the money lives in a payment file, and nothing continuously reconciles the two. A site with a 1998 ground lease, a 2004 assignment, three amendments, a recorded memorandum of lease and a 2019 easement is not one record. Effective terms have to be computed from that lineage, with the ability to show which instrument set each term. That is the part spreadsheets cannot survive and packaged lease modules flatten.
The arithmetic: per site pricing against a build, and where it crosses
Lease and site platforms in this market are quoted per site per month, sometimes per agreement, so substitute your own quoted figure for ours. Take $12 per site per month. At 1,200 sites that is $172,800 a year, or $864,000 across five years, before implementation and before renewal increases.
Price a build over the same five years. A first release at $120,000, migration and abstraction at 20 percent, and support at 17 percent a year from year two comes to roughly $225,600. Those lines cross at around 310 sites.
Do not build at 310 sites. That is the point of showing the arithmetic honestly. The subscription line is complete and the build line is not, because the item the crossover ignores is the abstraction backlog, and it is the single largest cost in this category. Turning thirty thousand scanned documents into structured terms is a programme in its own right, and it is the line most often left out of a budget entirely. Document extraction reads the lease and the amendment chain and proposes values for the standard terms, which turns a two year manual review into a few months, but it does not remove the human confirming each figure against the linked page. An escalation clause misread by a model becomes thirty years of wrong payments.
What a custom build actually costs
Across the projects Digital Heroes has delivered, the shape is consistent. A focused first release covering the site and agreement model with amendment lineage, abstracted terms driving a payment engine, escalation as a rule rather than a number, lifecycle status with termination control and payee controls runs $80,000 to $160,000 in 14 to 20 weeks.
A full platform adding colocation and revenue share billing tied to deployment milestones, equipment inventory, permit and structural records, a landlord portal, accounting integration and portfolio analytics runs $200,000 to $500,000 over 9 to 15 months.
Data migration runs 10 to 25 percent of build cost and in site portfolios it sits at the ceiling of that range every time, for the abstraction reasons above. Year two onward runs 15 to 20 percent of build cost annually, covering hosting, support and the changes that follow every acquisition you make. Two further costs to name: your accounting team will not accept an approximation of lease treatment, so integration with the general ledger is real work, and multi jurisdiction operation changes indexation, notice and tax handling in ways that add scope rather than configuration.
The four situations where building wins
Four conditions move a portfolio across the line, and two or more of them should be true before you commit.
- Regulatory and accounting fit. Your lease treatment, your notice obligations and your registration and permitting records have to reconcile to one site identity. Antenna structure registration, the Federal Aviation Administration notice filed on Form 7460-1, environmental and historic review, and the ground lease all describe the same asset, and today they sit in four systems that do not share a key.
- Scale economics. You are past the crossover above with real headroom, meaning well over a thousand agreements, and the per site fee is scaling with the thing you are trying to grow.
- A workflow that is your competitive advantage. If you compete to acquire portfolios, the speed and accuracy of diligence abstraction is commercial rather than back office. A firm that can price a tranche in three weeks instead of three months wins deals, and that capability is not something a vendor sells you.
- Integration sprawl across three or more systems. Enterprise resource planning (ERP) payables, a lease accounting engine, a deployment tool, a geographic information system layer and a document repository. When five systems each hold a fragment of one site, the join is the product.
The strongest single trigger is landlord scale. If you face thousands of individual property owners who each expect a correct payment and an answerable statement, a landlord dispute has to become a two minute answer showing the clause, the published index value and the arithmetic on one screen. Nothing off the shelf does that from your own drafting traditions.
How to decide in a week
Run this test on Monday. Pull twenty site agreements at random, weighted toward the tranches you acquired rather than originated. For each one, answer four questions with the document open: what is the current effective rent, which instrument set the escalation and what does it actually say, what is the next renewal notice date and who owns it, and what is the site lifecycle status. Time each site.
Then run the second half. Take your current payment file and match it against the list of sites decommissioned in the last four years. Every match is money leaving monthly, and the total is your business case in one number.
If twenty sites take an afternoon and the payment file matches cleanly, buy the product and fix your process. If you cannot answer the escalation question without a lawyer reading a PDF, or the payment file surfaces ghost rent, the next step is a paid discovery phase. At Digital Heroes that ends with a signed product requirements document covering the agreement model, the escalation rule types, the migration plan and the acceptance criteria, before any code exists. You keep it whether you build with us or not. We are wrong for you if you want staff augmentation without a specification, or if your abstraction backlog has no owner on your side. We contract through Indian LLP, US LLC and UK LTD entities so 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 all checkable.
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.
- In the Flexera 2025 State of ITAM report, respondents reported roughly 33% of SaaS spend is wasted, underscoring how paying for off-the-shelf seats and tiers that go unused erodes the supposed cost advantage of generic SaaS. Source: Flexera (2025) →
- Poor software quality cost the US economy an estimated $2.41 trillion in 2022, including roughly $1.52 trillion in accumulated technical debt, driven partly by unsuccessful development projects and low-quality legacy systems. Source: Consortium for Information & Software Quality (CISQ) - Herb Krasner (2022) →
- In a February 2026 survey of 517 small-business employers, 82% had adopted at least one AI tool (typical firm uses five), 66% reported revenue increases linked to AI (22% reported gains exceeding 10%), and 74% said digital platforms make it easier to compete with larger firms; owners saved a median of 5 hours per week and businesses saved a median 11.5 employee-hours weekly. Source: Small Business & Entrepreneurship Council (SBE Council) (2026) →
- Per the Standish Group CHAOS 2020 report (reviewed at this URL), across tens of thousands of software projects roughly 31% end successfully, about 50% are 'challenged', and roughly 19% fail outright; small projects succeed far more often than large ones, and Agile approaches succeed at markedly higher rates than Waterfall. Source: The Standish Group (2020) →
Frequently asked questions
How much does custom tower site lease management software cost?
A focused first release covering the site and agreement model, abstracted terms, an escalation and payment engine and termination control runs $80,000 to $160,000 in 14 to 20 weeks. A full platform with colocation billing, deployment milestones, a landlord portal and accounting integration runs $200,000 to $500,000 over 9 to 15 months. Add 10 to 25 percent for migration and 15 to 20 percent annually from year two.
Can artificial intelligence abstract our leases instead of a manual review programme?
It can propose values and it cannot replace the reviewer. Extraction models read scanned leases and amendment chains and populate the standard terms, which turns a two year manual programme into a few months of confirmation. Every term that drives money should link to the page it came from and carry a named reviewer. An escalation clause misread by a model becomes decades of incorrect payments, and nobody notices until an audit.
Who owns the abstracted lease data if an agency builds the system?
Settle it in writing before kickoff, because the abstraction output is often the most valuable thing the project produces. You should hold the repository, the cloud accounts, the extracted data and the right to hire another firm without permission. At Digital Heroes the client owns code and data from the first commit and the system runs in the client's own account. Ask any vendor for the same in the contract, not in an email.
What happens if we miss a termination notice window?
The term usually renews on the clause terms and payments continue, which is how ghost rent starts. The fix is structural rather than diligent: derive payments from a site lifecycle status, so marking a site for decommission automatically creates a termination task with the notice date calculated from the clause, an owner and an escalation path. When the date passes without a notice recorded, the system should report the failure with the cost of the missed window attached.
How long does it take to roll a new lease system across thousands of sites?
Fourteen to twenty weeks to a working first release, then the abstraction programme sets the real timeline. With extraction assistance and a review team, thirty thousand documents typically runs a few months rather than the two years a purely manual pass takes. Abstract only the terms that drive money first, meaning rent, escalation, term, renewal, notice and revenue share, and leave the wider clause library for a later pass.
What is the difference between lease administration and lease accounting software?
Lease administration holds the operational record: terms, notice dates, landlord contacts, payments and site status. Lease accounting produces the balance sheet treatment required under ASC 842 or IFRS 16, including right of use assets and liability remeasurement. They are different problems with different auditors. Most portfolios keep a specialist accounting engine and integrate it rather than trying to reproduce the treatment inside an operational system.
Should we build if our portfolio came from several acquisitions?
That is the most common honest yes. Portfolios assembled through acquisition carry drafting traditions that do not normalise, the same landlord appears under four spellings, and no two tranches share a data model. Normalisation is your actual project rather than software selection. A build lets the model match your agreements instead of forcing your agreements into someone else's schema, which is what usually produces the parallel spreadsheet.
Can one system hold both deployment milestones and lease obligations?
It can, and that is one of the stronger arguments for building. Site acquisition, zoning, aviation determination, permitting and on air date are tracked as a project, while rent commencement, escalation anniversaries and renewal windows are tracked as a lease. They constrain each other constantly. One site record with both timelines lets you answer what committed rent is running against sites not yet producing revenue, which no deployment tool alone can compute.
How do we stop duplicate payments to landlords?
Hold one payee record per landlord entity with a validated payment instruction, run duplicate detection across payee and site rather than payee alone, and place an automatic hold when a change of ownership or change of payee arrives. Route estoppel and assignment requests through the same record instead of an inbox. Fraudulent change of payee letters target manual processes specifically, and a hold with a verification step is the control that stops them.
Is it worth building if we only manage a few hundred sites?
Almost never. At a few hundred agreements the subscription arithmetic favours buying by a wide margin, and the abstraction work that dominates a build cost is the same effort whether you build or configure. Buy Sitetracker, Siterra or Tarantula, put a person on data quality, and revisit when your agreement count or your acquisition activity changes the picture. Building at that size solves a staffing problem with capital expenditure.
Who owns the source code if an agency builds my ERP?
You should, in full, and it must be written into the contract as work for hire with IP assignment on payment. At Digital Heroes every client receives the complete repository, database schemas, and deployment documentation, so they could hand the system to another team tomorrow. Walk away from any ERP proposal built on the agency's proprietary platform with ongoing license fees, because that recreates the vendor lock-in you were escaping.
Is SAP overkill for a mid-sized company?
For most companies under about 500 employees, yes. SAP S/4HANA is built for multi-entity, multi-country enterprises with implementations measured in years and seven figures, while SAP Business One, the mid-market product, still forces your processes into its mold. If your competitive edge lives in how you operate, a custom ERP scoped to your actual workflows ships faster and costs a fraction of an SAP program.
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.
Can I start with one ERP module instead of the full system?
Yes, and it is how most successful custom ERP projects at Digital Heroes begin. We build the single module causing the worst pain first, typically inventory or order management, get it live in 10 to 14 weeks, and let it prove ROI before the next phase gets funded. Starting with one module also derisks data migration because you move one dataset at a time.
Is customizing Odoo cheaper than building an ERP from scratch?
Usually yes in year one, and often no by year three if your workflows sit far from Odoo's assumptions. Odoo's published pricing starts around $25 per user per month and the Community edition is free, but heavy customization means every version upgrade can break your modules and needs paid rework. If you expect to rewrite more than about a third of the core flows, a scratch build with clean ownership tends to cost less over the life of the system.
Can a freelancer build an ERP, or do I need an agency?
An ERP is too wide for one person: it needs backend, frontend, database design, integrations, QA, and someone mapping your business processes. A solo freelancer can extend an existing ERP or ship one small internal tool, but full ERP builds by single developers are the most common rescue scenario Digital Heroes takes on. If budget is tight, shrink the scope to one module rather than shrinking the team below three or four people.
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.
Will a custom ERP scale as we grow from 50 to 500 employees?
Yes, if it is designed for that from the start, which mostly means clean database design, permissions that handle new departments, and modules that stay separable. Adding users to software you own costs nothing in licenses, the opposite of the per-seat scaling penalty on NetSuite or Dynamics. What does need budget as you grow is new modules and integrations, so keep a small standing development arrangement rather than restarting a vendor search every two years.
Who can build a custom ERP software system?
Digital Heroes builds custom ERP 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 ERP 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.
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