With little investment in learning how wind generators works and with the right plans,

So if you're the do it yourself type, you should have no problem building your own wind powered generators.
But of course, making your own wind generator can be very tricky and difficult without the right manual. Having a manual that's well illustrated, provides detailed plans, tells you exactly what parts are best to get the most energy out of the system, and holds your hand through the entire process is essential.
Manual that I find best for building wind powered generators could be found HERE.