The verdict in three sentences
For a Miami contractor, the problem is not producing an estimate but producing it fast, accurate, and turning it into billable progress invoices. A custom build at USD 15,000-35,000 covers takeoffs, bid items and progress billing with integrated payments; a SaaS at USD 35-70/user/month starts faster but adapts poorly to local bid schedules. The decisive number: cutting invoicing errors from 15% to 4% recovers cash directly on every job.
Estimates, takeoffs and progress billing
The core of a contractor platform combines a price library, fast takeoffs and progress billing. The MVP priority is clear: estimate first, progress invoicing second.
| Item | Custom (USD) | SaaS | Target gain |
|---|---|---|---|
| Price library + takeoffs | 4,000-9,000 | Included | 3x faster estimates |
| Bid items & estimates | 4,000-8,000 | Included | Standardized bids |
| Progress billing | 4,000-8,500 | Plan-based | Errors 15%→4% |
| Integrated payments | 3,000-6,000 | Add-on | Faster collection |
| Jobsite dashboard | 3,000-6,500 | Plan-based | Margin per job |
Budget and MVP prioritization: the 2026 numbers
Assumption: 6 users (owner, estimator, site managers, bookkeeper). 2026 order of magnitude.
| Scenario | Setup / Yr 1 | Recurring/yr | 36-month TCO |
|---|---|---|---|
| SaaS USD 45/user/mo | 3,240 | 3,240 | 9,720 |
| SaaS USD 70/user/mo | 5,040 | 5,040 | 15,120 |
| Custom USD 20,000 | 21,500 | 1,500 | 24,500 |
| Custom USD 32,000 | 34,000 | 2,000 | 38,000 |
Under 6 users, SaaS is lighter if standard bid schedules suffice. Once takeoffs and local bid schedules get specific, or payments must be native, custom earns its place over 3 to 4 years.
Mini case study
Carlos, a contractor in Miami, runs USD 3.8M of work/year across 8 jobs. His progress-billing errors reach 15%, about USD 570,000 billed late or short, hitting cash flow and driving client follow-ups. Moving to 4% with automated progress bills hardens roughly USD 415,000 of invoicing per year. Against a 3-year custom TCO of USD 24,500, the tool pays back in year one through secured cash flow and shorter collection cycles.
FAQ
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Start with estimating or invoicing?
With estimating. An estimate MVP (price library + takeoffs + bid items) validates field use in 6 to 8 weeks, then you add progress billing. Accurate invoicing requires accurate estimating.
How much is the price library and takeoffs?
Budget USD 4,000-9,000 as a custom build. It carries the best return: it cuts estimate production time threefold and hardens margins at the bidding stage.
Can payments be integrated?
Yes. A payment module costs USD 3,000-6,000 custom and speeds up collection on progress invoices, a critical point for jobsite cash flow.
What invoicing-error reduction is realistic?
Moving from 15% to 4% is credible with automated progress bills tied to takeoffs. On USD 3.8M of work, that hardens over USD 400,000 of invoicing per year.
SaaS or custom to start?
SaaS suits under 6 users with standard bid schedules. Custom wins once local bid schedules, specific takeoffs and native payments become structural.
Let's scope your project. Tell us your annual work volume, target users and indicative budget, and we'll cost an estimate-before-invoicing MVP. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
