This is sure going to be ome insane diff spikes in the coming months ahead with the new 7TH miners coming out will be a tough call to produce some RIO on equipment. Bye bye the old days of having 60GH and then 200GH to make 1 BTC a day. To make  BTC a day now you need aprox 110TH compared to 2013 and 2014 is a massive spike to push the home user to generate anywhere near that you need own co-location for that sort amount of power. Would need at least 15 of the new 7TH units without any diff jumps to be in with a chance. With 7TH now your able to maybe brake 2BTC a month or just under with diff changes every few weeks. Wonder what the price in BTC is going to be for the units and with the current price of BTC is going to also be interesting too.