Larry I agree with all your statements except one. Cost of natural gas varies with suppliers. When we moved in to this place we deliberately shut off the gas on the advice by friends and neighbors. They had found the gas too expensive. They switched to being 100% electric. We live in a region where the electric power is from hydro-electric power dams so it is cheaper. This will definitely vary region to region.
There are ways to make either electricity or gas at home so this is still an option.
I do wonder why you recommend: “Use only 120 volt for appliances (no 240, usually for electric a/c, heat, stoves and ovens, washer/dryer, arc welder)” This runs counter to the physics law of I squared R losses all electrical system must obey. Why would you recommend wasting energy in the wiring?
