IMO, you are not going to find specific rates in reference to your descriptions. There are just too many variables. Take a look at some of the very generic paint shops (Maaco, etc.) and work from there knowing their work is quick and cheap.

The only real way to get a price is to take those cars to the shop. Even then, expect price increases because sanding/stripping can reveal a lot of problems that you thought were not there.

In general thougth, I think you're looking at $2-5K per car, maybe more depending on the quality.