Ed,
Will get you specs on my Champion compressor system. I went with a pretty big system so that the compressor is not laboring. Bead blasting is a huge draw on this system. I used 3/4" copper pipe with approx 8 drops (can't have too many) including an overhead retractable 50' hose, and one outside (this is a good one). I have a water evaporator by my compressor and several valves at the low points in the system. Out here in the desert, I have had very little water issues. It is a good idea, if possible, to separate the area (room is best) where you will be doing grotty work, i.e. bead blasting, grinding, drilling, etc.
I am no expert Ed. I knocked on a lot of doors and asked to see folk's garages.