I like this...but how about instead of an office, you have a closed off space like this with a dining area. Just a booth.
Less Is More:The Tiny House Movement | Homestead Honey Our family of four built and lives in a 350 square foot tiny house in NE Missouri. This infographic, from Custommade.com is chock full of reasons to go tiny!
8x28 family tiny house, no practical dining area but a covered deck could extend the living space (by the side door).
andrew odom tiny house 030 Andrews Family Tiny Home on Wheels: Rooms and Spaces and Tiny Places