do you have an estimate on what these will cost to build?
No, but I'm saving the bills so I'll have a good idea when I'm finished. I'll have more money invested in the setters, due to the turning racks and motor unit. I don't feel that I'm skimping on any part of these incubators and at the same time I'm trying not to go overboard with costs. If I decide to take orders I'll have a good idea of the price I'd have to charge. The problem is you can probably buy an imported incubator cheaper than I could custom build them.
Do they have certain features you can't find in a manufacturer's unit?
I guess I'm building these mainly because I want to. They make a good project to work on on a cold day. With over 30 years of incubating experience, I feel like I'm making them the way I want them for my operation. They may be no better than GQF cabinet incubators. I've used the same fans, latches and other parts that GQF uses in these, but these are totally my design. As I've mentioned before, even though GQF now has acrylic windows in their doors I've been modifying their units for many years to include that design.