You are a legend. This is one noob who fully intends to commission you to make a harness once I have figured out my first build. Perhaps you can charge a design/consultation fee at the beginning of a project, or accept deposits before you buy materials. You can always credit them towards the job once it is actually paid for, and keep the deposit if they bail on you or are just using your expertise to further their own production. Maybe there is even a market for consultation on the whole build/concept?
I hope life eases up on you. I know too many people in your boat right now, and sometimes its hard to keep smiling. In truth, we are all in that same boat, and the sooner we realize that the better. Hang tough, keep doing what you do best, and please post your site again here.