Mining is not all about power cost, there are many other factors that would determine a successful mining business from a complete losing investment, some of those factors are:

1-Gear price
2-Timing
3-Luck

Luck itself involves many things, including but not limited to (gear failure / hashboard dying etc,,)

With all due respect , the fact that you are asking such a question - indicates that you are way too far from being ready to enter the business, while mining is plain simple to run and maintain, and as BitMaxz mentioned ,you really need no skills what so ever, but this does not discard the fact that mining is just another business, if treated otherwise you will probably end up losing money regardless of your power cost.

I am not trying to let you down, but I have seen people fail big time due to lack of simple knowledge, my friendly advice is  "read more"