This is a very good and basic explanation what happens when you go into mining.
I agree totatly with Gladimor, i have only a few rigs, and the work involved in keeping them online most of the time is mind bogling to say the least.
It really involves a lot of hard work and frustration, and after a while, even if the profits are good, you really start to ask yourself, considering how much raw hours you spent on the farm, is it really worth it?
Specially if in the morning is cool and evening is blood hot. That is why I don't mine, I know everything about mining but don't do it at all, by the way check your power cost, right now return of investment is around 20 months.