there are many discussions on this board about this topic and you DO NOT have to pay these prices to get these results. These barrels turn up on Craigs list all the time for between $10-20. They are usually from a food-grade manufacturer like Pepsi or some such. I bought one for $12, had strawberry flavoring in it, took it to the car wash with two gallons of vinegar and have been using it since. I do like the concept of the little dolly, somethign I never had thought of before.
I added some pumps, some uni-seals, some PVC and made a free-standing unit, pictures of which were included in the previous posts. Let us know if you have further questions