get a building without neighbors--standalone. visit the area at night to see if people made lofts in industrial areas near your space. heavy bass will carry at least 1/2 block or more, and longstanding loft types won't take losing sleep, etc. and you'll have pd on you.
brick and drywall will hold sound better than metal or wood. the less windows the better, but they can be insulated.
brick and drywall will hold sound better than metal or wood. the less windows the better, but they can be insulated.