On18, 14 foot Stake Braced Baggage car (or work car or Caboose) Craftsman Kit by Railway Recollections

Parts needed Microtrains couplers #1023 and Microtrains trucks #1010, #1015, or Microtrains BX Express trucks. The Express trucks look like short passenger trucks.

There is no prototype for these passenger car. It is something I wanted for myself. If I am going to make something for myself I can make kits out of it. 
They track well as they are bottom heavy. The side doors are separate parts. They can be positioned where you want them. 

This car could have a lot of uses.  As a caboose, a baggage car, a work car, a crampt place to sleep,even a temporary office.