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Right now I'm about to make the einfälle statt abfälle model. Just because it's the cheapest you can make, but it takes some work. It will give the power for some compact fluorescent light.
The einfälle statt abfälle's idea is to make the wind turbine from recycled materials ( a car alternator, a water pipe..., so on)
Another good option is hugh piggott home make turbines, better machines but more money, skills and work are needed.
I have build a few hugh piggott's turbines so if you chose that way don't hesitate to ask (not at all high tech turbines but they work for more that 8 year with really few maintenance). In both cases, the budget depend in your ability to reuse materials.
A small hugh one can go down to 500€ (let say 200w nominal power, including everything). Don't forget the tower because you'll need one and the materials there are not that cheap). In the einfaelle model we expect to expent 150€. But my partner is very good in finding reusable materials.