I think I'm going to expand on BeeGhost's idea. I have a 6 ft tall tower shelf in my garage, built for a closet 10 years ago, overbuilt, 2x4's and 3/4 inch thick removable shelves. If I need something for varying heights at varying times, and sway proof to boot, I add the extra 2 ft of height at the bottom with both vertical and angled out boards that widen the foot print at ground level. Bolts with butterfly nuts.
I want stable, sturdy, storeable, and re-usable easily. Because I have a funny feeling this may be a common situation. when not in use, gold up the lower legs, stack the saw blade sharpener, insulation and junk back on it in the garage.
I can also use ground anchored ties (when we get wind here it is serious wind,) and a couple of drilled in bolts to the house, either into masonry, or into solid framing through the siding. Got customer's permission to drill the bees a new entrance, so I can mount to all siding, I'll caulk the edge they've been using and drill the hole on Monday when it's colder. I also have figured out how to improve on the napkin situation to block the interior access. Home Depot sells this wonderful foam tube to stuff in window frames in different diameters. I use 3/8 on my aluminum windows, removable caulk but not sticky, just foam. I think 5/8 would totally block the bees access to the house, since the LIGHT is what is drawing them. Only 2 bees got in since my last visit, a huge improvement. Afterward, can leave the stuff in place or remove, either way. Maybe $5. Thanks for all your help. Eating dinner, and testing my support stuff. I'll be out on my day job for about 14 hours tomorrow.
Gypsi