I've been using a 60 gallon, single stage, 220v, 19cfm IR compressor that has no problem keeping up with anything. No waiting for it to catch up to me. Devilbiss Startingline guns for primer, HF Black Widow for finish coats. I started long ago with a CH 25 gallon, 5 hp and wouldn't keep up with anything! One lug nut, take a break, next lug nut, take a break. Cutting disc tools were useless.
I just finished painting my transmission and water pump with my Fuji turbine system. it's 110 volt and weighs about 30 pounds and is self contained. I live in Indiana and it is expensive to get dry air from a compressor. This was epoxy primer, base, clear. This was my first time spraying. Almost no over spray. Not perfect but not bad.