Redesign Spiral Staircase

Job ID: 32024348

Budget: $30 – $250 USD

Looking to redesign a spiral staircase so that it can open and close and we can utilize the space on the second floor where the stairs are.
There is a nice 3d walkthrough of the apartment on Redfin here: https://www.redfin.com/MA/Boston/42-Garden-St-02114/unit-1/home/9258404

We are hoping to make the stairs into something like this:
https://www.youtube.com/watch?v=qlkYdGU8Bh0

But I have no idea if it will be feasible. Can you help?

Matt