Wind isn't that great for us. We're in a built up suburban area - so wind speeds rarely get above the 5MPH needed. A small roof-mounted domestic turbine will only generate about 1kWp and cost about £2,000. A freestanding one (assuming we could get planning permission) would be about 2.5kWp and cost £15,000!
So solar was £8,000 for 4kWp - sure it doesn't generate during the day, but it's a lot more efficient.
I engaged a specialist to plan and install the system. Unless you're fully qualified, please don't mess with your electrical supply!