What brand of paint do you want? Dupont? Spies? Candy?
Materials alone will be a huge part in a paint quote. What color do you want the car? The color will affect the price as well due to the amount of body prep. A white car will have a lot less blocking than a black car.
Id also advise going to quite a few shows and ask people who painted their car. You will see paint jobs all over the map. Find one you like and get the painters #
Oh and one more thing. DO NOT PAINT BEFORE TRIAL ASSEMBLY/FITMENT !!!! I made this mistake and Im kicking my own ass everyday. It added more money onto my build because I have had to repaint stuff twice.