Lein the people's houses and sue the [censored] out of him. Its amazing how quick a contractor can make money appear when he has the homeowners on his back. I have been there before, and that way worked. The problem, is if it was long enough ago, you may no longer be able to lein the homes.
Utah has a period of, I think, 90 days to do this. Thankfully I havent had to do it in quite some time.
His bad reputation will spread a lot faster and be more damaging then yours will. If you are worried about pissing off the homeowners talk to them first and let them know what you are going to do if your not paid.
