Have you considered one of the packaged solutions this one is $400
It depends on how many hours you will need to become proficient with FMP.
Whether a packaged solution with no modifications would work.T
The help available here is infinitely deep.
A sad fact I have learned, it often takes 3 times longer than estimated.
Once the client sees what CAN be done, they find new things they wished it would do.
There is the hardware and software - how many users to start?
There are several ways for companies and educational entities to purchase FMP.
Filemaker Pro and Advanced can support 9 FMP users and 5 Web browsers users. Past that you need Server or Server Advanced.
FMP Pro and Advanced have the same hosting capibilities 9FMP and 5IWP.
Advanced has greater reporting capibilities, can create Runtimes and Kiosks. And is recommended for Developers.