http://www.princessauto.com/pal/prod...s/Barrel-Dolly
I bought one of these last year for stacking our window-mount A/C units for storage through the winter. Just makes it easy to move them around.
The dolly was only $25, give or take.
The uniseal bulkheads are making me nervous. Thats a lot of water to hold back with a press-fit seal.
Think I'll do some research about mounting one down low.