I've been looking at taking the easy route now. Still having trouble finding someone to weld on old propane tanks. They all want to weld up a type of clamp on bracket. They even have me a little worried putting in the ports on the top and bottom. Someone here suggested just tapping in 3/8" holes straight into the tank ends since the metal is thick enough. I figured standing them at about 60* angle putting about 25 gal of water in tank would make this pretty safe since the drill shouldn't ignite anything with water behind it. I thought I could manhandle the tank into the back of my truck too to take it to the welder to make the clamp on bracket. Even with jacks and blocks I couldn't do it on my own. I could borrow a trailer and get some help but I'm wondering if it wouldn't be much simpler to just leave it horizontal, put it against the wall next to the 2 500 gal storage tanks and use the dip tube for my connection. Someone else mentioned the tank gauge works great to track the water level. I know those dip tubes must go very close to the bottom of the tank and the integrity would have to be sound to function right when used for propane. Does anyone see a downside to using this 250gal tank in this manner? I know it will take up 7 feet of floor space vs. about 3 feet standing up verical. Since I'm not stacking the 2 500gal storage tanks I might just build my storage shelf over all 3 tanks along the same wall. I figured the shelf might make good storage and even give me a place to stack some wood for those really nasty winter days. Is there any reason for not leaving it horizontal other than I am wasting quite a bit of floor space?