Different idea
I used a hollow core door (33" x 80") as a table top on a steel frame that I welded up from from some leftover 40mm square tubing. It's on castors, and I also added a couple of full length chipboard shelves. It was a cheap solution, and the size works fine for me, but there are endless variations that you can use, and the EAA design is a popular choice.
As an aside, I ordered my kit in early Feb, so based on the time interval beteen our respective kit numbers, I figure that VAN's must be selling an average of about 10 RV12's per month. Not bad.