These are stackable. You just have to add 4 brackets to make them stack. This way, you only have to buy what you want/need not necessarily 5. I thought it was reasonably priced to have the feeder, waterer and heating plate included. Heating plates can be from $50-100 by themselves.I hate that its only one bin and not the stacked ones! i dont think i want to pay 200 for only a single box.