<human>: Give me the gist of the text in a nutshell

So my dad has a classic truck that he wanted to get repainted. He found a painter here in Portland who had a good reputation. The guy had represented himself as a partial owner of this body shop. They met up, talked over the work required and agreed on a price. My dad paid him half of the money up front, about $5,000. A few weeks later the painter asked for an additional $2,000 for supplies.

The painter has now become extremely flakey and hasn't done much of the prep work required on the truck. The real owner of the body shop told my dad that the guy is actually homeless and hasn't paid him any rent money to use his shop. The 3 of them were supposed to meet up and discuss a plan how to work this out. The guy no-showed and won't answer his phone now. Apparently he doesn't have any assets except for a mustang (unknown year and quality) and I assume he's spent the money. The owner of the shop has all my dad's parts and, to protect my dad, won't let the painter remove them from the property.

Is my dad out of luck or is there something he can do? Small claims court? Police?
<bot>: my dad gave a painter who turned out to be homeless 7k and the guy hasn't finished the work and won't return his calls