Agreed on replacing door. Used parts are cheap and makes restoration much easier. You might be able to find a shop that will spray car for $2000 if you do most of prep work. Seems to be about $3,000-$3,500 for a shop to do prep and paint. You could also ask around local car shows to see who else paints. Odds are you can find a guy that does good work for himself or on the side. Best paint process is two stage, base coat followed by a few clear coats. I would just read up on paint process and techniques so you are familiar with it. You can also check out cars that person has or is painting to get idea of their work. Any pics of your car and what color is it? Can't go wrong with black or red on a thirdgen. More $$ for changing car color since you have to paint a lot more items (door jambs, under hood, engine bay).
http://www.autobody101.com/ 
