[moe]

Sorry, posted wrong chassis. Look for the SC847, that's 45x 3,5" in 4U. With 32x 2T S-ATA you're looking at roughly $5000 (incl. disks).

And Google likely gets them quite a bit cheaper than that.

[carbonica]

Eh, I was definitely lowballing a lot with "a couple grand." You also need to factor in power and replication.

[moe]

Not sure what you mean. It's still a couple grand when you factor in power and replication. ;-)

For google it's a rounding error either way. They measure in Petabytes, not Terabytes.