Wind Turbines 5 to 20 Megawatts have the lowest cost per Kilowatt

wind projects 5-20 mw have lowest cost per kw

Because wind turbines are economical for relatively small project sizes, it is feasible for small groups of investors to own a turbine project.  Local ownership increases the projects contribution to the local economy and  the number of local jobs.

John Farrell, Energy Self Reliant States Blog