I have given up any pretext of living a conventional life and am building an airplane in the main living area of my house, which is massivly relaxing, and feels right/normal, which it didn't without the airplane.Which is to say that I suspect building X/pinball machines is the same.
Most of the parts should fit through a normal door. It is common to build an airplane in your house for years, and then for the last 2 years rent a hanger for final assembly. (Most people don't get to the point of final assembly, but those who do...)
Pinball machines are great entertainment, but a plane? Wow. Someone next door to me, when I was growing up, built a boat in their driveway. It was amazing, and they took a long time to both get it right, and to make it seaworthy and comfy. After launch they sailed it around the world. Amazing.
Wow, that's fascinating! What else can you tell us about the boat? How big was it? What was the rigging? How long did they take on the circumnavigation?
https://en.wikipedia.org/wiki/Hobby_tunneling
I've always dreamed of doing something like that.