Still waiting on the 50 g/h orders.
It's in hand.
20 btc for a 50 gh machine is not cheap even if it starts hashing today. you want 2500 usd for your machine. a 50 gh machine at todays diff will earn 1 coin in the next 7 days at the current diff of 189 mill.
the next 10 days diff will be at least 210 mill so it will earn 1.1 coins so for 18 days you will earn about 2 coins. it will not make roi for at least 6 months most likely never.
it does not matter that it is in hand. or that the power is free.
Why doesn't it matter if I have free power?
I can just mine for literally years once I find an auto payout script.