Also, windmills require at least 80 gallons of oil and maybe hundreds of gallons of mineral oil. And each windmill requires a pretty large footprint.
If I had the land and the money, I'd buy a windmill. They produce a large amount of power.
There are places where the wind pretty much constantly blows. a lot of them. The wind farms in California near Indio - they always have wind, but whenever I've driven by, maybe half of them are shut down. I suspect because they are feeding too much power into the grid. They have to be shut down.