Approach solar grazing with caution. Take their money and be ready to run. Don't scale up a huge flock you cannot afford to feed otherwise. Let the idea percolate for a decade. Very likely the forage quality will decline and farmers will end up spending more time on the mower.
@sovernTranch Farmers should graze the fields but let's learn for a decade. This quite possibly will not be viable long-term. Take advantage of it, but don't be cheerleading for centralized utilities taking over farmland. It's not all rainbows. No rotation. No interseeding. No integration.