I don't know how much you know about wind turbines but it's certainly a case of research before you buy, there are an awfull lot of crap products out there! The most important things you need to know is they have a cut in speed, that is a windspeed below which they do nothing as well as a power curve that indicates what they will do for rising windspeeds, many crap ones produce no usefull output in anything less than a hurricane. The other thing you need to know is all turbines will only operate properly in laminar flow, the dont like turbulent flow, so height above ground is a must and avoidance of any obstructions is another. I would get yourself a small battery charging one second hand to experiment, living on the coast you should have plenty of wind but it may take a while to find a good site and enough height to get it working properly. I had to give up on that one and go solar instead! My plot is not large enough nor was I allowed a high enough pole (planning restrictions) to get out of the turbulance.