https://www.youtube.com/watch?v=jgPof9sbjFc
My boss is having something similar put into his three-story house this week. It is not long and narrow, but square. Still small though. And on the pricey side.
I know two friends with smallish elevators ... 4 x 4 feet? It is nice, especially when 3 floors are involved.
Wow that is small
That thing is a like a coffin. I'd probably take the stairs.