https://www.thingiverse.com/thing:3420372 3d printed VAWT design
https://www.amazon.com/gp/product/B005G8VDKM 1.5 kw windmill $500
windpowerworkshop by hugh piggot is a great starting place the guy pioneered the diy scene.
freenode or efnet #electronics irc chat or irc.anotherpower.com #otherpower
someone should create a hybrid star delta controller for wind generation that uses one for low speed one for high speed
i remember reading about it from uofa university 10+ years ago andrew knight was the researcher.