I guess you could make your own but if you got the money and don't got the time just buy one. That's basically my situation and plan on getting one from hotbox incubators. I've seen them in person at shows and was impressed also the price wasn't even that bad well for the smallest one anyway. I think a lot of people make their own as well a lot of people buy theirs. I guess for you it boils down to how big of a deal is it to save money on an incubator.