Sorry, mate. I spent 30 years in commercial construction prior to retirement. Anyone with a similar background can determine at a glance that the tecchnology, and materials that would be required would be cost prohibitive.
There’s a reason these were computer simulated without an actual functioning model. That reason is money. It is nothing more than a very intriguing design exercise.
If even one of these ever reaches the point of production - and costs anything less than a million dollars, I’ll buy you one. Deal?
Update: I checked their website, and I stand corrected - sort of.
There was one , and only one built. They are trying to license their designs, not selling products, so it is highly unlikely you will never see one in person.
Still, my offer stands. If I had your name, I could fill out an undated check to purchase one for you should I be wrong.