When I first saw these things, my experience as a millwright and subsequently a designer and engineer of large scale processing plants, I said immediately that the issue of maintenance would far outweigh their capability to generate enough power to pay for itself.
The first farm I saw was the one at the pass outside of Palm Springs on my way back to Florida from one of the last races at Riverside.
Always execute the straight face test first.
All so that it all looks like nice and "green" when they take pictures of it.