Earlier quoted context omitted.
Why do you assume that water quality consultants would buy a software product from you alone? Selling is hard, and a big part of it is knowing your customer, and gaining their trust. This guy would have a much better chance at accomplishing that. He had a lot of value, you just failed to see it. He made the right choice by finding someone else.
The point I was trying to make is that making an MVP water consulting CRM for a single customer isn't very equitable for me. The amount of money I'd earn for the time invested feels like it'd be less than what I'd likely earn as a consultant for anyone paying an hourly rate. If I decided to build a CRM for the water consultant market, he brings little to the table for me. What I mean I can find a water consultant tha…
This part I completely agree with you. If you're splitting equality (relatively) equally. He should be as committed as you are, if he's not, than you need to be compensated extra for it.