Thanks guys, Randy, we don't have AC just a swamp cooler (which actually really impressed me on a few hot days).
I have a blank spot on my breaker labeled "Garage" that has been scratched out. I have searched high and low and can't find anything in the garage that would allow 220v access. The blank spot has two circuits marked off (for 220v) but they have a blank cover no breaker installed.
Ige, I like that idea a lot. I will most likely run a 220v outlet for the compressor into the attached shed behind the 3rd garage (where I will keep the compressor to cut the noise down) but I will most likely punch through the wall dividing the shed/garage and install one more outlet on the interior of the garage... along with an on/off switch to control the compressor power.