The best place to start to learn how to build a wind generator is to find the DC motor used for wind turbines to produce home wind power. We have found the best sources for motors; hubs and even towers and most are easily located or even free at times. The DC motor used to power your home made wind turbine costs usually about $30 and can be delivered right to your door. Interestingly enough this part is the most expensive thing you will need to purchase. So why are commercially made wind generators so expensive? The 1000w machine we looked at recently cost in excess of $3200.