Cut into hill for ground contact and cool north wall. Miners placed in north room constructed of cinder blocks, brick, railroad ties or other material. The roof of cool room will hold solar panels.
The greenhouse roof will begin just below the solar panels, with the cinder block wall as first support. The roof line could be one slope from the north holding solar panels to the south being Windows, transparent roofing or plastic.
I structure framing could be made out of cinder blocks, railroad ties, wood or brick.