Minimum Air Compressor
You should buy a good used unit. If you have 220 volt hook up that will do you well.
Get 15 - 17 + cfm at 90PSI, get a 60 gallon tank. You will probably be running 5 - 7 hp electric motor and a 2 stage, 2 or 3 cylinder compressor .
Lay down setup is nice.
If I had 220 I would be running an electric. Unfotunately my shop is fed with a single 15 amp circuit so I have a home build self regulating 11 hp gasoline 3 cylinder compressor. Works outstanding.