You mean, like this?
I got the wire shelves for free from a friend a long time ago and have been using them for a couple of years now. I recently added the wheels that they sell at Target and they work just fine even with a large grain bill in my cooler and a full 10gal HLT at the top.
My only and biggest problem with this setup is trying to get my RO water into my HLT. Lifting a 5 gal jug that high just isn't fun. However, it does work, and works well.