Unfortunately, wind turbines are very complicated devices. Effectively converting wind energy into useful electricity requires a lot of complex components that can't just work, but have to work well together.
If you're really dead set about building a wind turbine, then I would suggest you buy the more complicated parts commercially and focus on building the more simpler parts. That is buy the power controllers, speed controller, and generator off the shelf and just focus on building the turbine itself.
Theres a lot of kits out there that might fit your needs too.