I only consider RV travel because I'm able to move with the seasons. I would have to be plugged in to run the ac in the summer as running a generator around the clock just isn't practical. I'm guessing that anything below 40 degrees and our 5er furnace would run non stop so in the winter we go south. I'm equipped with four 6 volt batteries and a large battery charger and generator.
We also want it to be 70 degrees all the time. I can stay home and be comfortable by the fireplace. I dont blame her as that 50 degree talk was over long ago for me. If I gave most RV's an easy to operate in temperature range it would be 50 to 80 degrees. Outside that range and it's time to start burning lots of power.