This is beautiful. From the look of the kitchen island and the bar stools, the kitchen is likely to be nicely done as well. I like the loft for a guest room. I would also consider sliding barn doors as a separation for the bedroom.
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.