To me, the most interesting "hack" here is how the Tumbleweed house company has hacked its way onto Oprah, NPR and the top result for "tiny house" on Google.

I wish my startup could do that.

They've done a remarkable job with PR and are effectively the Apple Computer of trailer homes.

I'm guessing that people post it as a physical hack. Hack in the sense that they're doing more with less than "should" be possible. Add that it's mildly counter-culture and environmentally friendly, and people vote it up.