After spending several weeks in the Bahamas surrounded by sail boats with wind generators, I beg you, PLEASE, do not install one. They are so annoying to be near. Much worse than someone running a genset all night and all day. You might as well be blasting your stereo 24x7 for all to hear.
Plus, at 50W, it's not going to help much. With any reasonably sized battery bank, 50W of charge will do little more than offset some of your loads. That helps, no doubt, but don't kid yourself into believing it will really charge batteries that are low. Sitting on a hook with zero load, it could keep the batteries topped off, but it won't effectively recharge a half drained battery.
As a general rule of thumb, if you can install 5x the solar capacity you will generate the same amount of power per day. That's because the wind machine runs 24 hrs per day, where the sun gives you the equivalent of about 5hrs of full sun per day. So if you can install 250W of solar you will get the same benefit, and it will be free of mechanical wear and breakdown, and be silent for you and your neighbors. Plus, when it is generating power, it's actually enough of a kick to have more of a charging effect on the batteries. I haven't run the numbers, but I'll bet it's less expensive to install too.