What about making a setup like a Kegorator.
I actually was considering something very similar as a long time ago my cousin and I turned an old fridge into a Kegorator.... I figured I'd use the extra fridge in some way since it's already plugged in and just holding a few things.
you really gotta get space between your cards, pci-express extenders work great,
Totally agree and that's what I'm doing to assist in air flow... funny to see how many people spike up their prices on those extenders when you can order them from China at $3 a piece.