I need some air compressor schooling

I have sold quite a few of these portable airless compressors with good results. It sounds like a 5 hp. 60 gal or 80 gal. would be best for you but a model like this would work good.
They usually sell for around $400 and would be easy to resell later if you wanted to step up to a bigger one. tmm
http://www.dewalt.com/tools/compressors-wheeled-portable---electric-d55168.aspx