Here is the AutoCAD drawing. The casters are from Harbor Freight. I used a piece of clear lexan over the pump.
http://www.harborfreight.com/3-1-2-half-inch-x-1-1-4-quarter-inch-medium-duty-swivel-caster-41524.html
I only had 3 feet of storage place so a single tier was out. Its 3 foot long and just over 4 feet high on casters. 15gal BK, 10gal MLT, 10gal HLT. HLT filler with water filter plumbed to hose. PID controlled RIMS tube. Control box on hinge so it can be folded away. 2 propane burners one for BK...