I love tiny houses!! Years ago I rented what used to be the cook house and laundry on a plantation. Which meant that the main house didn't have a kitchen. They turned a closet/hallway into their kitchen and I loved to go over there. It was SOOO TINY that they had found clever ways to use every square inch of space. It was neat and tidy and totaly charming.
It is only 7' wide. The original owner was the developer and builder for the neighborhood who planned for an alley. In his old age, he built a house on the ground, instead.
I think it is called a "Murphy bed" in the back room. It has to be lifted to reach the backdoor. This is a little small but, the floor plan: