Holy crap! Isn't that overkill? Maybe you are the planning for a major expansion? Also, how noisy are those fans? I'm trying to design a small home basement mine.
I don't know if its overkill - I have the 5 avalons, an eBit, and some S7s running - and have some S9s on order. Mining requires always expanding your hashrate as difficulty goes up.
The fans are pretty noisy - about 90db. About the same as running a vacuum cleaner (or two). I run my miners in a warehouse, and they heat the rest of the warehouse.