We have about 12000 sq ft with overhead air lines...copper but PVC would be the same. Tips: you can install the system so that it drains to one corner and put your drain there. The tilt doesnt have to be much but you want the condensation to run down hill to the drain. Tip 2: when you install a tee for a quick disconnect, install the tee so that the pipe exits the main line upward so condensate will not drain into your quick disconnect. Then from the upward pointing tee, route the pipe so it turns back down to where you want it. Tip #3 use the thick wall PVC (schedule 40) and pay attention to the rating (I think 3/4 is rated 200 psig).
Tip #4 install a dryer if you can. compressor dryers are cheap new ($800) and really cheap used. most of the time you can find one that needs a freon charge Tip #5 put a drain on your compressor tank and drain it often