I'm thinking something akin to this for the loft stairs, except with another loft on the other side and the second set of stairs meeting in the middle. "A 355 square feet tiny house on wheels in Felton, California. Designed by Molecule Tiny Homes.
The cabin is extremely compact, only 352 sq., however inside there’s enough space for an open plan living room with a small kitchen, bathroom, and storage space. A ladder leads up to a sleeping loft above the open living space below.