So I read online about using cardboard to germinate hardy ground orchids symbiotically (In this case Bletilla striata). I had an open pollinated seed pod from the 2023 growing season which I sowed in a takeout container in October 2023, on some sphagnum with chunks of cardboard randomly placed...
You could get a small fridge, water reservoir and a water pump and pipe cold water through a radiator inside the tank to chill it. Don't know how effective active cooling will be for a glass enclosure though.
What temp ranges are you considering as warm and cool? With large seasonal fluxes, might be good to keep species with large elevation ranges so they will be fine in all seasons.