Based on the numbers, I don't think that you could even mine a year and be in profit if you don't have enough cash to throw into this field as it has become a way of making money only for those companies who are actually making those hardwares. BitMain as well as other big giants have been into the game since the start and getting even a pie of the cake seems completely impossible unless you give them some really nice hashrate.
If you have very cheap electricity price, you will mine for a long time.
