That will be a wonderful shop with plenty of space. +1 on Pottz comment. Take some time to watch some of the Oneida DC videos even if you don't buy their product. They talk about proper DC piping design. There are also a lot o good Youtube videos out there. Do it right the first time. I tried just about every type of DC and messed around with various piping designs, partly because I'm an engineer, and realized that a lot of the hype around the various DC is just that. There is a reason commercial DC is run overhead.