Modelling a Cleaner's Trolley

For the last week and a half, I have been laid off work (boss overloaded), so I have been keeping myself busy by entering competitions.  Be warned, these do not pay very much, and if you do not win, you get nothing for all your work.
Still, it seems I have to be cadding along somehow.  One of the competitions was for a motorised version of a cleaner's trolley.  I was quite disappointed when the number of stars I got was 3, and other entries which were just hand sketches got 4 stars. Oh well, this is life! I put quite a lot of consideration into exactly what was going into the trolley, and how it was to be accessed.  The more highly rated did not seem to even consider the items to go inside.

Here is my entry, modelled in Autocad 3D solids, and rendered in Showcase:

Added 19 December 2017, this was the winning entry: