I bought 0.5w/GH hardware for 1BTC/TH over 6 months ago - its basically paid for itself and still holds the same value on the resale market. This stuff at 2BTC/TH, without power supply, is insanity
add the risk of miner failure! and that is over a longer time!
miner broken and you got fucked like a royalty!
This is a problem lots of people don't think about. Such a high value single product, one controller doing everything. The "idea" is NOT to put all your eggs in one basket.