Professionally built racks are great, because they last much longer than wood DIY racks, and they sell easy if you ever want to sell them. DIY racks are nice because they are cheap, but do not last as long. I built a snake rack, used it for a year, and then sold it. The wood was already starting to separate, and the some of the tubs would stick when I was trying to pull them out, which in turn would spill the water. I decided to go with the professionally build racks. I have six Reptile Basics racks, and a Freedom Breeder style rack. I like both, but both have pros and cons. The Reptile Basics racks hold humidity really well, but do take up more space per tub than the Freedom Breeder style rack. I am always fighting with humidity with the Freedom Breeder style rack, but it saves on space, and I love the metal construction.

I suggest looking into the newly designed Freedom Breeder racks. They are much cheaper now than the original style, which is the type that I have. They are now designed to humidity better too.

Hope this helps.