Getting ready to build a shop- first time in many decades I have done so- perusing this forum for ideas.

Build a shed 3 feet from the garage for the compressor and anything like a blast cabinet. You can get it wired and plump the air lines at the same time you build the main garage. It will be the end of compressor noise (including getting startled when the thing comes on unexpectedly). Having the blast cabinet not in the gagrage keeps abrasive media from making its way into places that you don't want it. I built an inexpensive 8x8 shed and had extra room for some more (all important) storage.