Some folks suggested some stuff with wheels. My son will move it, and it'll take time to center it again on the screen. The projector will be stationary.
There was one suggestion to use a wall-mounted stand. This looks fantastic! But my projector sits about 2' away from the wall so something that comes out 15" isn't deep enough.
From a couple folks, the closest thing to what I'd want if it was going to sit on the current storage bench: https://www.amazon.com/dp/B07FVY52KY?th=1
These types of products are really expensive. In fact, they're more than the cost of the storage bench itself. If I could raise them to the height of the storage bench or more, then I could replace the entire storage bench with a unit like this.
Since it wouldn't look very good on the floor, I'd have to cover it with a table cloth or something similar to make it look like regular furniture.
From the Amazon product page, looks like this one only goes up to 16.7" which is slightly shorter than the current storage bench, and I'd need it higher. My only hope is that it would sit cleanly on top and raise up to just the right height, but it's also a lot longer :/.
This is the IKEA unit I have right now:
Another idea I had
is to find a heavy stand, mount a piece of wood to it, and then mount a height-adjustable projector ceiling-mount to that. Might work, but I don't know if it'll hold. They're supposed to be mounting the projector the other way around.
Something like this might work: https://www.amazon.com/dp/B07RWLZ8JX/ref=emc_b_5_i
. My projector is only 3.9-4.4kg and this stand maxes at 5kg. It'd look weird coming out of the middle of the carpet, but from what I've seen screwing into a carpeted floor, it's not obvious the carpet was screwed into when the unit is removed.