That is rather extreme! i wonder of theres a way to balance out your temperatures using thermal mass.
Using the mass a flywheel to moderate the extremes
have you heard of the Walipini system?
https://thehomestead.guru/whats-a-walipini-underground-greenhouses-101/
https://au.pinterest.com/yolimk/pit-greenhouse/?lp=true
Years ago I looked at underground greenhouses like in your link. I forgot about it. Thanks for the links. I will investigate. This could help.