>>211461660>minimal natural lightyou can literally see windows and skylights are entirely possible
>extremely hot in the summerwithout ac this is objectively one of the coolest solutioms you can have (which is why ancient peoples in various parts of asia minor lived underground)
>moisture issuesthis is true: groundwater and damp would be a major issue for a home like this
the solution would be having a ventilated cavity between the earthen layer and the interior wall; any home like this (and any home period imo) would need an air system
that would also make the temperature very regulated and comfortable all year round even without active heating/cooling