Update 2: Have over 20MH now which was my goal from the start, once reached its not enough and now feels like I have 1 card running.
I've moved most of the PC's into custom rack and now sitting a on a shelf and left the other 3 Rigs inside the HAF X-B case as pictures below.
35 GPU cards in total, 1 x 290x, 6 x 280x , 27 x 7950 and 1 x 7970
Still have 4 cards in RMA, which will bring it to 39...
That's amazing great work, I bet you already got a ROI. I really want to upgrade but I need to get atleast half of my investment in crypto back before I can justify spending more $.