Hey y'all! Being off grid, I'm looking at building a small cabin. Within the walls of this cabin, I'd like to have a little bathroom with a shower and a sink as well as a kitchen sink. I don't think I'll need any other fixtures except for the possibility of adding a clothes washer to the mix. I'm wanting an on-demand propane hot water heater as well. I've been told that I'd need a pressure tank for this set up instead of just a large RV type 12v waterpump. how would I go about figuring out what size of water pressure tank to get and what pump would work? I would use less than 5 gallons a day unless I showered and used the washer. I have a 1200 gallon above ground water container that I would manually fill from a community well. Any information would be appreciated.