A yurt is basically a large circular tent with solid walls and a floor. Some can be quite nice. Don’t know that I’d want to live in one, especially during storms, but it’s not bad at all if well furnished and in a scenic location.
I am told the circular shape helps. You don’t feel quite so boxed in if the 90 degree angles aren’t there. There are octagonal homes, and I’ve been in one house that had twelve sides.
But under 400sf? I could never.
If it was in a nice location, I think it would be awesome to live in one.