I'd suggest to look at a few more before purchasing. The Arctic Fox line is well regarded by some that full-time. In the Winter, I'd suggest to look at some insulated skirting and heat lamps or portable heater underneath to keep the floor warm. For me, I could probably maintain a pretty good life at 50f but my feet would be in rebellion with a cold floor. A cold floor gets old fast. I've stayed in trailers where the heated temp was 70f but there was snow and ice on the floor by the entry door. Another cold radiator is windows. 1 1/2" blue board friction fit in the window opening is the best solution I've seen. The foam panels can come off in the day for light and back on for nights.
I'd also suggest to buy a vented propane fish house stove. You will have to do some installation for the vent but these little space heaters use a fraction of what an RV furnace uses for propane. I have the Sportsman brand heater and it is in it's third RV. You just can't beat them for efficiency and comfortability.
Good luck with your new RV lifestyle.
