I lived on a floating house on the west coast of Canada for 20 years.
When I moved to the DR, I was shocked people did'nt harness the free energy.
There is a site
Southwest Windpower, Energy conservation, Solar Energy, Water pumping, Photovoltaics ,Check out the links.You will be able to find out if your area is good for wind power. (you check out anywhere in the world).
I have used wind turbines and would never mount them on a roof. The harmonic vibrations would drive you mad.
There is a company in Quebec that sells a great wind generator:
default ($1000cdn for 30 amp)
The generator uses a delco remy GM altenator and a system that keeps the blades from over reving (ie. do not have to tower down in a storm)
A couple solar panels for $600 cdn (30amp.) and the turbine and you good to go.