Yes the frame is on casters and it has a little bit more support than what is shown on there. I added another 2x4 on the bottom and across the front for the paneling since it was slightly bowed and its only 1/4" pine sheeting. The 2 front casters are rotational the back 2 are fixed, 3" casters since it weighs quite a bit with everything loaded up.
It is not totally enclosed, the back is open for easy removal of the freezer if needed and there is about a 2" gap all the way around between the freezer and where the wood is on the frame, so not really worried about it overheating.
The bar top is probably going to be granite tile, haven't decided on exact color/pattern yet. Going to the store this weekend to get that decided and then install this week.
The coffin is being cooled, I will take some pictures of that later and post them up. I have a 120MM fan inside the freezer to draw air up to the additional area that was added by the collar, inside the coffin I have 2 smaller cpu fans, one drawing air in and one pushing air back into the freezer, the whole thing is insulated as well.