Losing Interest

I can't believe that you need advice about the guy that's had your car for 3 years. Go get your car. Then pick one to sell. You don't seem to have the knowledge, or finances to deal with 2 classic cars. I don't think you will get your money or parts from him. The thing about classic cars, is it's way more work than fixing a newer vehicle. Brake caliper leaks? you have to figure out why. Engine knocks? You have to figure it out.
I'm wondering if the person working on your car is someone who used to be on this forum alot. If so, run away (after you get your car.