A little railbus with a trailer. 
The parts that I used are: Chivers front and rear walls, rear walkway, roof; cut-down Athearn Hustler grill; Evergreen styrene for most everything else.
 This is mounted on a Bachmann 44 ton mechanism.  The trailer is a modified Chivers Baggage car mounted on a Bachmann bobber caboose body with scratchbuilt details added.