I am fairly new to the whole RV world, but one thing I have learned is that multi-power appliances are a big plus. When you connect to power at a camp site, having an electric water heater and cab heater are two simple ways to reduce your propane costs. Another good idea is to get an inductive burner for the counter and cook with electricity. You need propane to make heat, cook and maybe run your refrigerator. Having the option to do all three things with shore power is a good way to reduce propane costs, provided you end up staying somewhere you have hookups.
Jose