You can buy your tools for less then 300

First you need to find an air compressor with atleast 10-12 gallons, the bigger the better.

Then you will need an air line filter harbour freight should have them. Its also good to have another tiny filter at the gun, and install a gauge with a shut off

For a spray gun I have used the walmart brand Cambell Nelson professional, suction and gravity fed. Gravity feds are better to buy. 40-60 bucks

Walmart also has DA's I think there 30-40 bucks.

I do not know your experience level, but if your asking for a price range. I am assuming your a beginner learning. So you do not need a Sata or a Devilbliss spray gun to paint. Just make sure before you spray to empty out the air tank compressor.