Long power outages are rare to non existent where I live. But I like to consider buying at least a portable generator. I know people that own generators 30+ years, and rarely used them. Never for power outages for days on end. So I like to consider being prepared for bare necessities and not spend alot. Run the freezers and refrigerators, maybe the well pump and some lights and other stuff. I already have a gas fire insert, so I can use that for heat, have a gas cooktop. Would love it to be dual fuel. What generator to consider? Size?