Rack system

[Stewart_Reptiles]

How about just buying a reg shelving unit and putting tubs in?

Sure but you will have to deal with the leads which kind of defeat the purpose.

There are many DIY out there that can help you with the design of a rack.

http://www.baileyreptiles.com/cb70rack.html

http://www.arbreptiles.com/cages/41qt/index.shtml

And I am sure there are a few here on this forum in the DIY section as well