Many countries support wind power with incentive programs.
In the U.S.A. a number of federal, state and utility backed incentives are in place to accelerate the development of wind power. A 30% federal tax credit is in place for those investing in a small wind energy system.
You’ll want to check the DSIRE website, Database of State Incentives for Renewables and Efficiency, for rebates from your specific state or utility that may be available. Outside the United States check with your local governing authority and utility for rebates, feed-in tariffs and other programs designed to foster the development of wind energy.