I suggest you get a 60gal 3-5 hp single stage. These will put out about 10 cfm.
Farm stores and alot of places have units like this at 400 bucks and higher.
If you look at what you'll spend for a 30gal it's not much more for a 60gal but you'll need 220v and it won't be portable.
A unit like this will give you enough air,unless you want to sandblast.
Dan
