Check it out. This is how they grow it in Tennessee.
This was underneath a house in a cave. The entrance was through a secret hydraulic door in the garage that led to a concrete ramp that went about 50 yards into the ground.
Inside the cave was living quarters and a secret escape hatch that led you through a tunnel that exited via another hydraulic door that opened up a rock (!!!) on the outside.
The whole thing is very elaborate. Their set up allowed them to harvest every 60 days = multi-million dollar sales.
One of the dudes busted was living in a house on the water in FL and had a nice yacht.
It took 5 years before agents served warrants.
I'm actually sad for these dudes. If you put this much effort into growing weed, you should be able to get away with it.