Or ist it better/cheaper to just get a bigger room, treat the crap out of it and do tracking and mixing in the same room? I could put the mixer/interface, and 19" on a rolling cart (
Millenium RW2001 Rack-Rollwagen) and just move my control room into another room when tracking drums. I'd set up on little corner with foam to yell the vocals into instead of an iso booth.