Wind generators may be a good thing with winds of 20kts, but Have you looked at historical data...there is not anyplace in the world that I would cruise to that has a constant 20kts of wind.
In fact, there is no solid data that wind generators are as good of value in terms of KwH/$ as solar. I have tried for 10 years to get solid data from anyone who has wind generators. I have not received one bit of solid historical data in order to build a comparison/value model for wind, solar and diesel generator. It seems to me the best that I get is something like "last weekend when the wind was blowing and it was cloudy, my wind generator provided all I needed. OTH, there is solid historical data on solar. BTW, I did build a a comparison/value model for solar vs diesel generator...and the results are amazing...at least to me.
If money is no object buy both; if you are like me, you will choose one of them...choose wisely.