If you have 1/35th armor models and you have any capacity for woodworking you can build a shelf with 1 X 6 pine that could hold roughly 25-30 models in one compact space.
I have at least a couple of hundred built models. This shelf method helps.
You make a square with the pine, then back it with 1/4" luaun plywood, in my case 4' x 4' and it only protrudes out of the wall by 5-1/2 inches. You then install pine shelves every 6 inches or so.
This has worked well for my armor models. This is Ok for battleship type ships as well.
It would be worth the effort. Two of these could hold 50-60 armor models. And very neatly.