Well, “all you’d need” would to decide how big you wanted it to begin with, then cobble together some Disney-sized mechatronics for both the pop-up floor AND the drop-down ceiling...
It’d be super-bitchin’ THAT’S for sure.
Dang.
I got me thinkin’ and the end result is just gonna be WAY to ‘spensive fer me ta build.
I just hate it when that happens.