Separate essentials from preferences.
Write down the tasks the system must support and the exceptions that occur regularly. Mark which requirements are essential to operations and which are simply convenient. Test a shortlisted product against realistic examples instead of only watching a sales demo.
Count the cost around the licence.
Compare subscription or development fees alongside configuration, migration, training, integrations and support. Include the time your team spends on workarounds. For a custom system, budget for maintenance and operational ownership after launch.
Check the boundaries of integration.
Ask how data can enter and leave the system. An API might exist but exclude the records you need or require a higher plan. Test a small integration early. Confirm export formats and what happens to your data when the subscription ends.
Consider a focused middle path.
You may be able to keep an established product and build a small integration or companion tool. This can solve the specific gap without recreating accounting, payments or every other function. Make sure ownership and failure handling remain clear.
Make a decision you can explain.
Create a short comparison covering essential workflow fit, three-year cost assumptions, implementation effort, access controls, exports and support. Record the uncertainties rather than hiding them inside a score. The best next step may be a trial or small prototype.