Idk....not sure he does either, he just knew he "needed" a shed built like that.
Sometimes it's gonna be a storage shed, other times an office, or a bunkhouse, or?.....
He lives outside Boise Idaho, and I think he just likes being able to have an idea of something to build and then just do it without permits & inspections.
Lately he's been talking about making an air b&b in a "little house on the prairie" theme, with a bunch of buildings modeled after buildings in the TV show.
Don't matter to me....whatever floats his boat....as long as he's willing to pay us we'll keep building stuff.