This might have been thought (by a scant few) in the post-WW2 years as the latest and hottest thing when it came to really afforable residential housing. Think of it...no structure to build...simply hollow-out a gigunda tree into "comfortable" living space. And take it from there as you desire!! That was the basic concept here as this tree-mobile began its "sales-promotion-parade" starting in California...eventually circumferencing all around the United States and within.