Why not just do it right to start with? My gas appliances (furnace, stove,
hot water) are fueled with propane in an underground tank. Yes, propane is
expensive. When I moved to this house my first major purchase was a 10kw
Guardian standby generator hooked to the propane tank. Within 5 days after
the thing was installed, the power went out.... The generator has been a
Godsend out here.

Howard N7SO
upstate NY