Go to one of the Miami Lowriders car shows. I'm sure that you will be able to find a very talented artist that would be glad to paint your rig for thousands less than most shops. If you have ever seen any of the paint jobs on their cars you can see the talent and a lot of them were painted in their own garage or driveway. Having painted a couple of airplanes, cars, motorcycles, and motorhomes I don't worry too much about a vehicle painted outside. That is what color sanding and buffing is for which is to remove any blemishes. Keep in mind that the materials for a good paint job is not cheap.