before spending $40k and his own time he should have made a mockup of the software invested just a few hundred bucks in interviews with his intended customers, would have found out quite soon that it had no product-market fit
Or do you mean he should have invested into a designer to create mockups?
I built a very niche monitoring product for sysadmins. Actually I built it for myself three years ago, but I want to explore if others would pay for it.
If you are in the space, or anyone else who reads this I'd be grateful to receive some feedback on a 10 minute video call.