ROI is important but we don't have room for anymore panels we already have 3 100 watt panels and it's not going to solve our need for power on cloudy rainy days and at night we only need 300-400 watts anyway.
OK, TX.....you aren't stuck with 100 watt panels anymore. (I don't know when you got these.) There are residential panels that produce as much as 300 watts each, but I don't know how they compare (dimensionally) with your existing panels. I suggest that you might want to consider a panel upgrade.
I do still applaud you for the wind harvesting effort, though. I was starting to think along the lines of an alternator available to the aviation crowd, that pivots out of the fuselage, into the airstream for power, but you won't benefit from that unless you're moving, which you don't, by choice.
You might also want to research the effect (negative) of surrounding trees on the available wind energy when considering the best choice for your endeavors.
Do watch out for the hype-hucksters, though.
Good luck.....Roger