Aluminum Monster is correct--if you pay your bill, this is a non-issue. People DO NOT get busted because they have large power bills--there are a myriad of reasons that a person's power bills can be high and they truly do not give a hoot unless you are not paying your bill. Using several space heaters in a place will quickly add up to the power used by 3-4 1000W HPS. Hot tubs also soak up a lot of power, etc, etc. What DOES get people busted is not keeping their mouths shut, leaving growing debris laying around, not dealing with odors...that kind of thing. Trust us on this--pay your bills and the power company will not give you a second look. How large a grow are you looking at/how many watts are you thinking about running?
Sherrwood, I am looking into LED lighting and it appears that you save little if any costs on power--I am going to need about the same (working) wattage for LEDs as for HPS--a 700W that uses about 360W for a 32" x 32" tent or a 400W HPS.