Bitmain Antminer S7 cost about $533 each
You need power supply units (PSU) for the miners.
A Bitmain APW3-12-1600-B2 PSU cost about $140 each.
So, if you need 16 Bitmain Antminer S7, it will cost you about $10768 ...
Very nice summary. I never feel motivated enough to do such a thorough analysis every time someone asks, "should I mine bitcoins?", so I applaud your work.