It will take you 12 weeks to reach an amount of 1.710976 - given the facts that it works non stop and properly -
PLUS that doesn't include power costs.
So tell us, Wise oh Wise Hero Member, where are the droids we are looking for?
EDIT: The estimates given above are for only a 20% difficulty increase
17% on top of ROI in 12 weeks... name another investment where you can get those kinds of returns!