I can tell you a few things.

Materials (good ones that will last) will cost $1000-$2500, depending on color and other things, so remember that this much of the job does not go into the painter's pocket. Whatever is left over after materials cost, represents the hours he can spend on it. Do you want a two day job...two week job...or a two month job?

Dark colors will cost up to double the amount, due to the additional work involved, unless you are one of those people who can't tell the difference between Earl Schieb and "show quality" work. (Believe me, some people cannot see the difference.)

If you spend less than $5000 for the job, you are going to be very lucky to get a "street and show" quality job. It's more likely going to be a street car job, only.