Most of the time I ended up with one of two kinds of founder:
1) Very price senstive with a lack of investment mindset. With that kind of budget they would have been better off investing in themselves to either: a) Learn to code or develop some other valuable skills. b) Build a profitable service business.
2) Very busy running another business without the time to do the work of finding customers. They would have been better off either: a) Focusing on growing their current service business. b) Creating a non-software product such as a course, book, templates or a newsletter.
In general non-developers need to be prepared to invest at least an order of magnitude more than that. Any less and it's unlikely they'll take it seriously enough to succeed.
This is assuming you are aiming at clients with North American/European levels of purchasing power.