Jeff,
A pair of those will run about $2,100-$2,200 but for me it is seriously worth the money. The time savings is killer. Like I said, 15 minutes tops to strike a pretty good sized kit, and as quick as you can roll it on a truck you are done. If I were using standard roto-molded cases I would have at least 11 pieces and probably only two would have wheels. Then you get to worry about the drums getting destroyed in a truck.
I do have SKB cases for when these don't make sense or for when I have more than three kits out at a time.