Funny! Here's a few pics of the build.
The base. 3" swivel caster wheels, 2x4's and 3/4" plywood. Several 3" holes were put in the plywood after the pic to allow a little more ventilation.
The Collar. 1st layer is made of 2x2's on the sides and back, the front is a 1x10 on top of a 1x3...