I am by no stretch a professional but I do my own paint and body work. I have gotten pretty good at it over the last 30 years. Even a relatively straight car has issues that must be sanded and worked to make perfect. If not you will have wavy panels. This is especially true if the car has been sandblasted. If you do it right that can quickly add up to hundreds of hours. Then you have to do work to prep the car to paint, paint, clear, cut and buff... That's a lot of time. Not to mention paint and supplies aren't cheap. I don't paint for other people but if I did I would easily charge 10K to paint a straight car. It's brutal, tedious work if you want it to look good. If you want a quick spray go to Maaco but don't expect much. You get what you pay for.