Did mine in a 2 car garage. Check out TP Tools. Bought a cheap HVLP DeVilbiss ( "starting line") 2 gun set ( Primer and paint). Hung plastic and fan out the partially closed garage door. Not a lot of over spray with HVLP guns. See pics of garage after painting. I shot a single stage no metallic "Kirker" paint. Might not be show quality, but you can do it and save a ton of $.