Here is a recent article about 2 windmills here in Ohio that I installed this fall. The USDA paid 75% of the cost because it was an experimental project to pump out of springs to water cattle some distance away. I have installed USDA cost share windmills in several other states for watering cattle. There is some money out there for programs like this. The best place to start looking is your local Soil & Water conservation office.
http://magissues.farmprogress.com/OF...v13/ofm062.pdf