Don't do it. It's too late to start mining.
Imagine mining profits as a pie. If more people eat the pie, there will be less to go around. There are already too many people eating the pie and some people are better at eating the pie (those with very low cost electricity). If you are new and don't know what you are doing you will be probably be out-eaten by professional mining operations.
Yes, that is why i am purchasing as a double purpose. First as a mining place, secondly, in case if mining is busted, then it is still a vacation house or house to retreat if economic downturn hits and I lose job. Since I plan to buy by cash or most of it by downpayment, no foreclosure/underwater threat.
Regarding the pie thing, yes there are more people mining but there are also more forks, or even new coins appears to be being added, so I would not concern too much. Also, although ASIC is good but it is too risky, too expensive and unproven manufacturer. Can not be used other than mining etc.,