Last two blocks averaged 110TH for me as I also had to switch a few off prior due to electrical issues.
I've been kicking around some 'what to dos' myself with a potential upgrade, keep the old one running at a loss, etc. but nowhere near the scale you guys are operating on, for sure. Mine is essentially $75 more in electric each month; nothing compared to the $750 more in electric you guys are dealing with.
Too bad electric companies don't accept BTC.
My last months electric bill came in at $14,072.82, and that was with a temporary discount of $1,584 the co-op passed onto me.