What price is your electricity? It is one big factor in if your make a profit.
Is there a website that will tell me this based on my Zip-Code? I don't mind sharing my Zip, it's 80130.
It should be in your electricity bill. Make sure to add taxes and things they tax on.
I live in the same area, it should be $0.11 per kwh. If you were to keep two s3's on for a month it would run you $50 roughly, based on my bill, and with a platinum power supply.