About 12 years ago I got the idea of a large house where the walls had wheels. As your needs change, you can move the walls.
Then about four years ago I visited a community and they had a large shop/garage space and I suggested that they make shelves that reach the ceiling and have wheels, so the room can transform into a woodshop, kids playspace, classroom, art studio, etc. And then last year I saw that they implemented my suggestion. Very nice.
So this year we made three shelves 12 feet tall and on casters.
You can see some of them here:
This has worked out amazingly well. Freakishly well. For a while, a lot of the space was used for construction stuff. So we used the shelves to divide the space. One part was for construction and the other part was for eating. Then we moved the shelves for other needs. Then moved them again. Currently about 3/4 of the space is for farmstead meatsmith stuff and 1/4 of the space (we sorta made an adjacent room out of the shelves) is for rocket mass heater laboratory.
The shelves are 12 feet tall, 8 feet wide and 4 feet deep. One person can move them if the floor is clean.