I don't know. But if I'm approached by one of these guys I would do a sit downv and evaluate the model. Places with a lot of sun are great for solar. 

I've set up a solar farm before and a 16 by 10 foot array can kill you if it's energized improperly. 

Bell_curve

bitcoin_Mining

Anadro - Mine bitcoin with your roof

k00b

You can sit down with them and do the numbers. There had to be a very good incentive for them to up front invest in all of this and there had to be an incentive for you to give them some space to do so. 