I have done a bit of research on the popular racks and in terms of "cost per snake" the RhinoRaxx racks are higher in total cost than most if not all of the other websites. If you are looking at the "Ball Room Rack" specifically which has 4 41 qt tubs, Animal plastics, CSerpents, and Reptile Basics all have cheaper racks that hold 5 41 qt tubs stacked on on top the other. The only brand that is more expensive is TGR, which also has 5 tubs. Now the difference of course is the materials and build quality, as well as customer service and shipping time, but if you look at just total cost required, this would be a consideration.
I have those costs as well as information on most of the popular racks with total costs as well for each of the websites if anyone wants to know.