Not sheds really, but showing what people can build with nothing and live in them, found this blog that covers a lot of them.
This one caught my eye from 0yenhouse.com as I know many sheddies are looking to solar up their sheds.
This is a homeless’s house along a riverside in Tokyo. I met it in 2000. I could talk with him in this house and survey the scale. Surprisingly, he usesã€€the solar panel!