If you're able to get the equipment/supplies for $400 and you have never painted anything before. I would be willing to bet that it will not take less time or come out looking better than maaco. Materials alone usually cost AT LEAST $400 to paint a car, so if you're able to get equipment too you are going to be using some low quality shit. Also keep in mind that you're more than likely going to make a ton of mistakes your first few times. So things are going to have to be done and redone time and time again if you're the leats bit picky. It's going to get expensive. Take it to maaco if you're just wanting a cheap paint job.