But, as people have posted before me.
You don't really get a whole lot back on your investment.
In a day, while I'm mining during the night & work. I might earn $1 USD, and that's on a good day.
I'm only using a GTX 970 though. So I could be making more.
So you'll probably not get much from it.
I get free electricity, and wifi. And I never turn off my PC anyway. So it doesn't really matter.
I'd rather have the 1 buck, than not.