Yea like many have said the only way this could work is if you didn't have to pay for electricity.  The only way you're going to get zero cost for electricity is if you build your own power source... IE solar, window farm, or if you somehow find a way to tap into the zero point energy field (not likely). 

If you CAN find a way to offset the cost of electricity or even turn the deficit into a profit by putting more energy back on the grid than you consume, then the BTC mining venture would become the side hustle, as the incentives from utilities paying you would almost certainly be more profitable.