My sister and her boyfriend bought an old military bus a few years ago. It’s rebuilt to function as a home. Up to six people can sleep in separate beds. It has a small cooking space and sitting area with six seats. They use it as a mobile vacation home during summer.
The bus length is 11 meters and its 2.5 meter wide. You are allowed to be 8 people in it during travel.
Because of the conversion it can legally be driven (at least theoretically 🙂) by someone with a regular car drivers license.