I am marking this as done enough. I wanted to be supportive an get dh more organized and pointed in the right direction. There are circumstances beyond our control (a partner experiencing a severe mid-life crisis) and dh’s strengths and interests aren’t really in-line with the business side of this hobby. Not every business idea is meant to take off to support a family. It got him out of a stressful corporate job, so in that respect it was a success. He’d like it to take off at some point and enjoys the hands-on work in the shop. But for now he’s focusing on another interest that seems like a much better fit.