We are more interested in GPU mining because we have the infrastructure already and the is not that concerned with Power prices because our machines need to be on anyway.
You will not earn enough to pay for the additional electricity cost.
Please understand that a GPU that is running at 100% uses much more electricity than one that is idle. Your power bill will skyrocket. Also, don't forget about cooling costs. An active GPU generates a lot more heat than an idle GPU. That means your cooling costs will go up, too.
Well it depends on electricity costs.. + location of OP: if he's in northern hemisphere, it won't need cooling for the next 5 months