Trent,
Spray guns are not cheap, I bought a gravity feed from Harbor Frieght (it's a purple handle) and its not a top brand, incomparison to my Binks, Sharpe or my Iwata but it will get the job done, without putting a dent in your wallet. Cause you will find out that paint isn't cheap. Just keep in mind that there no mistake that sand paper cant take care of. Take your time use the recommended mixing ratios. PPG, Dupont, Its just a matter of choice. Don't settle for "senthetic enamels" that's what Earl Sheilb and alot of Maaco use and the longevity of a shine will not last, so what you'll spent for materials will out weigh and last those companies paint jobs. Plus the experience that you gain is unmeasurable.