Thanks guys!  I do have use of relatively large amounts of space out of town where there's some good potential for power and cooling (none of it currently in place).  The general idea was to run these guys at home where I can keep a close eye on everything, and in the event of scale up move it all out there. 

It's winter now and ambients are 0 - 15c, noise becomes a non issue, for the minute I'm planning to move the 12 I have out there now. I'd be trading heat / noise issues for less reliable power (for the minute), and potential network issues, plus an hour drive if anything needed to be checked.  Come summer I'd be looking at ambients of 30 - 45c, large space and lack of insulation would bring new heat challenges to the table, but I've got a few ideas if I were to put em on water.  I expect much will have changed by then anyway, so probably best to cross that bridge when the time comes.

Hopefully will have everything online soon, will let you guys know what I come up with!