Less land and water, but what about energy? It's extremely foolish and naive to waste the power of the sun.
Solar panels lead to lots of tech trash, e-waste which destroys the environment. Not to mention the buildings themselves and all the electronics required to keep such a farm running.
This kind of over-engineering will simply never work without a fundamental re-understanding of how our world works. It's just such a waste of resources. The "Mercedes" model. Make a really nice car for the first 50k miles, then sell it for $5,000 because each successive year of maintenance costs more than the car is worth.