Love the enclosure -- where'd you get it? I can't find one anywhere right now!
That was easily remedied. Water heater for pool house is directly on the other side of the wall. Plumber installed it during construction so it was really easy. Blowout at waterline in basement of main house to blow out the pipes for winter. Base is just left over trek from another job and PT 2x6. Directly over sand as I added the rocks after.