I call this a studio house. Except for lack of closet space, bookshelves, and studio space, this is great for a single person. But even for just two people, I would feel crowded. Bathroom is "normal" sized tho.
In the Silo? If I ever have land, I'm going to build a few of these for my kids as they become young adults but aren't ready to go into debt for a place of their own. They can go live in a drain pipe out back for awhile.
You could utilize the slanted-roof for passive solar heating. Canadian company NOMAD Homes has produced a new concept micro-home that measures just 100 sq ft sq m), ships as a flat-pack, can operate off-grid, and is said to be easy-to-build.
Brittany & Dan Gibeau Explain… How To Build Your Dream Mountain Tiny House ~ Great stuff. Getting info from a person who not only built but LIVES in a Tiny Home has opened my eyes to many things I had not considered.