It’s not even just a question of economies of scale, many east coast farmers grow corn just fine without any irrigation systems that’s a lot of capital you can spend on something else. Being able to lease out a tiny fraction of your land for a co-located wind farm alongside agriculture is a huge boon for many. And so it goes across a huge range of different situations.
All this variability is why you don’t see 20+% of US farmland under one giant corporation the way you see in many other industries which benefit more from economies of scale.