travel trailer that costs about 50k triples in size from traveling mode, to camping mode. 130 square feet when expanded

https://www.motor1.com/news/517004/camper-expands-three-times/

and it costs 5 times less than the prototype of the Romotow (not even being produced, as it's only trolling for investors it seems. 

https://robbreport.com/motors/cars/best-travel-trailers-2856269