You know, I don't know the first thing about the intricacies involved in producing power from a wind turbine, but I believe I have at least a rudimentary grasp of the mechanical aspects involved.
In that regard, I agree with Cecil. Honestly, the mechanical failures described do not seem insurmountable by any means. Perhaps I'm missing something here, but aside from the variable nature of the wind, I believe everything else is surely solvable, given some thought.