Got a 250 Gal. Propane tank and getting ready for another build. Actually 2 builds. Will get photos and show progress. First I need to get my car hauler cleared to use as a "work" bench as I use the welder at work (sold my equipment to my job). Looking at a RF unit with warming box. Beginning to get ideas and more. I like to add some sort of Natural Flow Hot Water Heater to a tank for sink. I saw it somewhere and cannot remember where, any ideas?