Julian do have any rooms with a lot of ceiling height? :lol
You could start your build with a balcony. :lolLol Max, yeah I have a room where I could put the ISD like on the pics, I think the ceiling is about 12-14 feet tall ! But that would not be a nice display lol :lol
Just build the whole thing, Julien. If you have to later, you can remove a wall to get it out of your house, like they do with those hugely obese people when they want to go out the movies and junk.