You can buy black 3/4'' black pipe in different lengths, just drive a few nails in the studs and tie wire it up to the wall, then when you move just unscrew it and take it with you. Something like this, http://www.1969supersport.com/draw1.html so its sloping somewhat, enough to cool the hot air out of the compressor.
Anyway just a thought.
Rob
Anyway just a thought.
Rob