Building a Rig with 4 GPUs - Thoughts?

[CrazyIdeas]

I was able to dig up a photo of 4 GPUs in that case, tight fit but it looks like it will fit. There's 8 expansion slots, but BARELY ...the last one looks like it's a part of the case.

I uploaded a example to imgur.com:

4GPUs in Server Case


I think I'll pull the trigger on this soon, but I'd like to hear from other peeps.