Setting out to build a make shift windmill needs to be broken into several needed actions:
Stay away from speculation. Rather than invent it all over again now is the time to scrounge find existing technology. Search the manufactures for what will work cost effectively. Search for those who have done point 1 and 2 above. See and report on how they made it work. We need to start where others have left off. Lets do our home work first.
Offered by Mike.