Argh, David.
My house is about 1200 sq ft. Also small, in the scheme of things.
It is hard for me to quote heating prices because we have a combination of gas (propane, for stove, log, and grill) and oil (for furnace). We keep our thermostat for the oil heater turned way low...like 60 degrees? I remember growing up when my parents had it cranked up to 72 degrees...but then, oil cost 26 cents a gallon.
We stay warm, but blankets are part of the heating strategy. LOL
L