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Dear Jonas van Poucke, I think the UK just wakes up from a similar dream, installing small roof-top wind turbines at large scale... Moreover, servicing such a lot of dispersed facilities is an ardeous task. Small wind turbines do need a lot of servicing per kWh produced, and together with the relatively high investment per square meter rotor area this yields in a high price of electricity. Our experience with a small (250 W) and robust two-blader points to roughly a 10-fold price when compared to 'large wind'. Also, you need staff trained and certified for working in heights to access these things on utility structures for instance. If you knew the potential pitfalls during such work, the risks and the dependency on weather and personal condition, you would not like to send your colleagues up a mast just to service a 1-kW turbine. Where there is grid, and this is where you have masts you can 'leach', there are more efficient and safer ways to convert wind power, if we as a society where ready... Best regards and good luck!