Thats kinda another style I was looking at, Cantilever style tables.
Ive even thought if we used a cantilever style shelf, we could then have say a stack of shelves. Then if you needed more space to put your stuff while working, you could grab an extra shelf or two.
Then again it may sound like a decent idea but in reality doesn’t work so well.
Ive thought of styles like the foldable similar to this as well
Regarding the Rubbermaid carts, we could get them in blue to make them easier to track. I will admit they are sturdy as hell. Ive used them over the years & they tend to hold up really well.
Again they are just ideas to get creative juices flowing and discussion moving.