I've done 3 different things with mine since owning it. Like some on here, mine is a 3 point BH, and originally I used to store it in a closed box truck when not in use. I built a 4' square platform with casters on it and set the BH on the platform, then set it in the truck with the FEL. That got old after a while and the FEL seemed to be getting tired of picking that thing up. My next venture was to use 4 2 X 4 square tube with a 3/8" thick plate, (for a foot I guess,) that someone made and I inherited, and there just happens to be four of them. I welded some more pieces of that same plate to the tops and made some tabs that straddled the frame of the BH. Drilled holes through the tabs and BH framework where not structurally important and stuck high-grade bolts through them. The legs were long enough to hold the BH off the ground at about working level. So all I had to do is raise it a bit above travel or work height, put in the 4 bolts through the legs, set it down on level and ground, and cover it to protect it from the weather. It, like another member mentioned, is extremely stable and I tried to knock it over but can't. FInally, some years later I built a carport and now store my unused implements under it. For the BH I stacked some cement blocks, (about 2 high,) and laid pressure-treated wood on it for a deck. Now I back the BH over it, set it on there, and disconnect. It's ready for a reconnect just by backing up to it. My outriggers also settle when not used so using them for storage is out. They also have lock hooks on them so you can lock them in the up position to prevent sag.
One thing here in Florida where I live is you can't just throw wood down on the ground and store anything on it because of the termites. Even pressure-treated in direct contact with the ground doesn't stand much of a chance. The stack of blocks with termite plates between the blocks and lumber works well though. Makes for easy disconnect and hook up. (Sorry this was so long.)