[Greenbuilding] estimating feasibility of home-use wind turbine

[George Tremblay]

An acquaintance who lives near the coast is contemplating installation of
a home-use wind turbine for generating electricity.  Anyone know of a good
resource for estimating feasibility (cost-benefit) of these systems? 
Perhaps obviously, dealers offering to sell these units are not the most
credible source of information, even where they may be very competent.

Thanks,
George Tremblay
Troy, NH