I love my new 12V, 500W, wind turbine from Missouri Wind and Solar. The turbine was a show room floor “like new” model that I got for $264. I had to buy the charge controller ($55), locking collars ($28), and paint separately. The 1 1/2″ rigid pipes ($36 each) were purchased at Home Depot. The extension chord is an expensive 12GA chord that I already had. If I had to guess, I’d say that I’ve got about $500 into the whole setup (not including what I already had installed in the trailer).