2. For sure, 150sqft is unreasonably small, even if it's a very luxurious 150sqft. But that's a strawman. If all of the sensationalism around this extreme end of the spectrum inspires Joe Public to reconsider his American dream of owning a 2600sqft home, and maybe opt for 700sqft instead, then that's a massive win both on the sustainability and on the household debt fronts. We should be celebrating, celebrating, celebrating anyone stretching the Overton window on this topic.
Yeah there's some decrepit mobile home parks out there, but most of these communities are not decrepit at all.
By the way, modern mobile homes (built in the 90s and later) get pretty big, many of them have 4 bedroom floor plans and stylish interiors.