Well all I can relate is what I know and experienced. I had my Pagoda painted for the first time in 2000 in Amsterdam, for something like $1,000 (can't remember now exactly, it's probably here on the forums in the old, old threads but it was much less than $2,000) which included some bodywork and some rust repair/ welding in a repair fender lip. I did the stripping off the chrome bits, bumpers, lights and such myself, and the re-installation of same, they did everything else. It came out just perfect, car looked superb (to me). Fast forward to end of 2017 - I needed 2/3 of the car repainted and had that done at a small shop in Langres, France. This time I did nothing, they did all the prep, stripping and finishing. Again, came out (to me) perfect, as expected. The cost was around EUR 800.
The paint I intend to use is single-stage, over two part epoxy primer. Here's an example of what you can get:
https://www.amazon.com/Restoration-Shop-Complete-Acrylic-Urethane/dp/B001B422M8?ref_=ast_sto_dpI will have the paint for my 1972 Lancia mixed to the original color, which will make it a bit more expensive.
I am not going for a 100 point show car. I am happy if the car looks great (to me), and similar to how it looked when it was new (when I think it was all single-stage paint). I don't want it to be over-the-top shiny. I want to be able to drive it like a normal car, and enjoy it, and not worry about a parking lot mishap turning into a $5,000 issue, and all the potential problems described here ("will they take it, what will it cost, will they go bankrupt, will it take forever, will I have to go 200 miles to get there and back", and so on, and, most of all, will I have to spend 30-50% of the car's worth - or 5%).
I guess I will see whether I am actually capable of doing a decent paint job. What I do know is that even the simple rattle-can matched-paint repairs I did on my Bronco, my wife's Volvo, my 1976 Yamaha XS 650 and our BMW Z4, all came out great (to me), and each job cost me less than $100. Will post photos when it's done, I hope in about 5 months' time.