You will want to start simple at first. Propane in our camper doesn't get filled often because we have a compressor fridge which only uses shore power and battery power from solar. We also eat lots of raw foods like fruit, nuts, sandwiches, etc. We do use the propane for heating the camper. Although we have a pop up with insulated soft top, we have warm and cozy sleeping bags and wool blankets on top and bottom. Snuggle. You may want to, as suggested, to find warmer locations. If you are to move, that would save you costs of propane. If you are handy with tools, you can find a used camper and remodel it to serve your purposes. Compressor fridges are not cheap but pay off in the long run. Good luck, you are young so have lots of time to figure it all out. Look at Truck Camper Magazine on line about buying a camper. They talk about new ones, I think, but there may be some ideas for you. The one thing to remember is to not have more camper than your truck can handle.