Would you live in a situation like his if the big house / lot was out of your range?
They keep saying 'Tiny home' and all I can think of as a Brit is, those rooms look bigger than many I've seen in a bunch of ostensibly fairly sizeable, fully detatched houses. I'd rather have a few good sized rooms than a bunch of small, poky ones that feel miniature as soon as you put in a shelf.
As a single adult, one of those houses would be great. You could be pretty content in there as a couple too I reckon. Shit, many couples live in far smaller spaces as is. The only thing that could really stand for improvement is more of a proper garden per property, especially if all the grass around the properties is going to be mowed right down to the ground like that.