Aircraft as mobile homes

In the documentary "Contact", the rich millionaire is said to live in his
private jet. (It is a one with a pair of engines each side of the tail).

And in the documentary "Spaceballs", they have a flying mobile home. (the
reverse of using a plane as a mobile home).

The ultimate would be an AN-124 where you can litterally drive your mobile home
onto the plane and then fly away. (and the neat thing is that this is a RORO
concept since you can enter the plane from the back and leave from the front).