UPDATE!
Wow, this has come together almost exactly as I’d hoped. All of the pre-planning was so worth the effort.
Even on for 101°F forecast high here in Maryland’s July sauna, the highest temperature I’ve recorded inside the greenhouse has been 102.2°F. The open side windows, roll-up door, and oscillating fan have done a great job keeping both the temperature and humidity remarkably stable, with no wild swings during the day or overnight.
Before setting everything up, I spent several days watching how the sun moved across my yard so I could choose a location that gets the most shade while still receiving enough daylight for the adults to breed.
The little garbage disposals are doing an amazing job. They’re processing about a ½-gallon Ziploc bag of kitchen scraps every 24 hours. There’s no foul odor, no excessive moisture, and no signs of overheating or hot spots inside the bin.
One thing I noticed today was that the collection cups had accumulated quite a few larvae that weren’t actually ready to pupate yet. I simply returned them to the feeding bin, and I think those collection cups are going to become my daily inspection point for harvesting feeders for my crested gecko while letting the truly ready prepupae continue on to pupation.