OK tbb42,
I could not talk you into Solar heating:-)
The most important thing I would like to talk you into is to study first!
Please DO NOT go buy the first new shiny toy or good deal.
Many here have done that, after they learn about things they wished they had waited.
$8600 is the cheapest 10kw wind turbine I have seen. Been a couple years since I looked.
I wonder why two graphs of the 10k-l and -h what are they? The -h is not 10kw at 10m/s.
The higher the tower, the more power you will get, check a wind map with speed at various heights. An important factor to consider is 26% higher wind speed will result in twice the power! (cubic function)
Have fun,
Scott.