Propane heating?

[bigdog]

I am looking at a new year-round home at the lake, and the primary heat is liquid propane in tank. House also has backup heat source using a wood stove, and kersosene Monitor heater.

Question....
How expensive would it be to heat entirely by propane for a 2000 SF house?
House is only 10 yrs old, so I guess insulation should be good.
Having concerns about annual costs, if I heating entirely with propane.

Any propane home owner's on the Forum?

Thanks for your feeback...