Good story
Only in Japan would this work. It's not even a proper mini-home(Watch Youtube)
All it has going for it is just water and electricity.
But that's what makes this story special. I admire broad-minded people like this, especially girls like this. It takes a lot of wisdom to live like this and know how to do so.
In truth what else could you really want? She's not lacking anywhere really. She's not poor and could return home anytime she wants
In other states you can't live as freely like this as the price would be higher due to security,etc. Even Van-homes require more stuff