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Your data team is confident. Your budget is approved. And building your own system still sounds like the smart, lean choice.
This guide is for the CFOs who've been there - or who are about to be. Three chapters. Real costs. The two things every team skips in version one. And a decision framework you can actually use.
📖 "We Built Our Own System." - The story A composite account of what actually happens after the decision is made: year one success, the hidden costs that follow, the audit that forced the honest conversation.
💰 The Buy vs. Build Question CFOs Keep Getting Wrong - The framework Why "what does it cost to build?" is the wrong question - and how to run a proper three-year TCO comparison across seven cost categories.
🔧 What You'd Actually Need to Build the BI & Reporting Layer - The reality check The full 12-component breakdown of what a production-grade finance reporting layer actually involves, with realistic build timelines and the components teams almost always skip.
📋 The 5-Question Decision Matrix Work through five questions before you commit. If most point toward "avoid build," the economics strongly favour buying.
⚖️ Side-by-side TCO comparison Seven cost categories compared across Build vs. Buy - with ongoing maintenance, governance, ERP upgrades, new entity onboarding, and key-person risk all included.
✅ You manage 5+ entities and are evaluating whether to build or buy a financial data platform
✅ Your data team has proposed a custom build on Snowflake, Databricks, or a similar stack - and you want to pressure-test the business case
✅ You've already started building and the maintenance burden is growing
✅ You're spending more than 10 days on month-end close and need a clearer path forward
✅ You've been burned by a vendor that promised flexibility and delivered rigidity
✅ You need a structured way to present the build vs. buy decision to your board or leadership team
The wrong infrastructure decision costs you twice - once when you invest, and again when the maintenance burden overtakes the value.
Building your own system isn't always wrong. But most CFOs who choose that path are answering the wrong question at the start, underestimating the right things, and skipping the two components that will matter most in year two.
This guide won't tell you which path to choose. It will give you the framework to make that decision with real numbers and honest trade-offs - not vendor slides.
20 pages. 3 chapters. 1 decision framework. Zero sales pitch.
Instant access. No sales call required.
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Built It. Maintained It. Regretted It. What three finance teams learned about building their own financial data system - and the honest framework for making the right call before you start.
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