content: In the description he says that the plan is to produce 50 watts for a total cost of 56$ (50€). Grant Thompson has a video on building a forge for 20$ and then you simply recycle your old beercans which helps keeping the cost low. IMO the biggest cost here is the 3D printing of the part, because not everybody has a 3D printer at home. Here is a cheap 3D printer kit to build yourself for less than 300$. But if you have one, or have friends that have one the whole project is pretty cheap, and you could make several wind turbines if you need more power (you could also use a 3D printing service to print the parts for you). Also in the description, but he didn't translate it, here are the files for the 3D printed parts The guy from the video also did another wind turbine, that did not work so well apparently. Bonus for aluminum casting: this guy makes some excellent aluminum ca  19bb  stings. He builds awesome little steam engine cars almost from scratch.  Sorry for the long post and all the links, but at least it's clear. Cheers.