I lucked onto an antique 5horse, 100gal rig from a gas station that was converted to a pump-yer-own convienience store and it works great for anything - runs steady when sand blasting, but that's to be expected, and they're all noisey if ya don't put'em off in a corner by themselves where noise doesn't get to ya
look around for decent used to start, and try to find 5horse w/ min 60gal tank - for the amount you'll use it, gotta decide what capital outlay is worth while
Bill