Living in my "homeless shelter" RV has opened my eyes to the cost of buying propane in bottles. I have plenty of wood split and nowhere to burn it. I have found that those little 30lb propane bottles don't last long when your heating and cooking with it. It always runs out around midnight when its cold and raining outside. I had a 100gal tank delivered last week and hope that will last most of the winter. The biggest drawback to propane is the condensation it creates in the windows and the slide outs. I bought 2 small dehumidifiers and plugged them in yesterday and hope that will help. I am using the electric heat mostly for heating until it gets really cold. Humidity isn't as great with the electric, but it will freeze you out when the temps drop to low 30's. I also just completed under pinning the RV last week and I can tell a big difference in the ability to heat and keep warm. Hopefully I will only have to do this for one winter and will be in my new house next fall. Time will tell, but I will have a wood stove somewhere in my house design.