Those two incubators I listed seem to be the more middle of the road selections as far as professionally made models. The Hovabators can do the job but they have a host of issues and aren't a model I'd want to trust a clutch to. I'm a technical (and at times, literal!) idiot so I wouldn't trust building my own either. I have bought several racks from Animal Plastics and have been extremely impressed with their quality as well as their customer service; however, I don't know that I would need that large of an incubator, soooooooo...it'll probably be Natures Spirit for me as well when/if my females EVER! get to size!