air compressor on the cheap

[jeff5347]

hey guys,
i have looking and searching to see what type of AC i need but am a little confused on what will andwont work. i am looking to get into the deep of working on the camaro. i will be pulling the interior and underneath of the car and am looking to sand and paint the inside and underbody. i have a 3 gal tank now for tires and stuff but i know that wont do. so the tools i figure ill use right away are a da, cutoff wheel, impact wrench, and most tools for body work. i saw this and this looked good but not sure if it is the right ac. i cant spend a bunch but the 4-500 isnt ok.
http://www.homedepot.com/webapp/wcs/...3+90010+524403

any guidance as i am lost as to what i need would be great.

jeff