I think you are severely underestimating how difficult it is to find a block. Its not going to happen today, tomorrow, next week, 6 months from now, etc. It literally is the equivalent of buying a lottery ticket and waiting for it to pay your mortgage off. Unless you have an absurd amount of hashing power (talking like hundreds of antminers, not your 5 14TH/s), you won't be making that ROI, you are going to run yourself poor in electric cost before you ever smell a block.

everyone here is trying to help steer you in the safe, reliable way to get your ROI and not go broke wishing on a star, join a pool like slush or kano (or nicehash if you are lazy), and let it ride.