Hi LaMar, I'm liking this design (Little Luxury Cabin 10X20) very much. I'm looking for hot water and a cabin heater (wood stove or ??). I'm thinking about a gas powered tank-less water heater. I'd like to have a wood stove but could live with a small forced air gas heater. I could also add a passive solar system on side opposite the entrance. SO much to do and so little space! I like the challenge. Any help would be greatly appreciated. Thanks, Steve