run #10 3 wire plus grd. for the compressor so you can upgrade to 30amp 220V later on. id split the outlets into 2 circuits. but i always over wire

Overwire for sure...it's the only way to go...the more you use the more you'll want to add, be ready for it...easier to do before, you upgrade and insulate and sheet rock..then add on another 20 ft, then buy a second or third valk to work on, more tools, more power, more, more, more, lol....