Garage freezer and fridge, plugged in together to the kill a watt for 24 hours show .04 kw/hr. So that's less than $3/mo at least when it's 10 degrees out!Maybe valve off all water to the house to eliminate leaky toilet valves and the like?
I bet that water heater is gonna be a winner.
Did you plug the garage freezers into a kill-o-watt meter for a period of time, like a week?, at cold ambient temps to get a trusty kwh consumption rate?