So what? Is there a shortage of land in the great plains states? No. There's a glut, and 4000 acres -- 8 sq. miles -- is nothing. It's a few acres here and there, like the telephone pole takes up space in a yard. We can use the land we're currently paying people to not grow crops on, and nothing is lost. The land is not "used up" anymore than the ocean is used up by sailboats.
On the other hand, while wind power might require 4000 acres to produce 50 MW, it uses zero oil, zero natural gas, zero coal, zero uranium, and produces zero byproducts.
Next.
So I take it that ANWR, at approximately 1300 acres, which has the capacity to replace Saudi crude imports (1 million barrels per day) for the next 30 years, is YOUR PREFERENCE, particularly considering to get that amount of energy from your wind, which blows 24/7 right?, would take windmills covering the entire state you live in.
And when your whole state is covered in beautiful, aesthetic bird cuisinarts, you most assuredly won't mind at all NOT HAVING ANY electricity, when that pesky old wind refuses to blow.
Your wind prices are also dubious at best. Got a source for those?