Better throw in a backup generator for the backup generator, as well. They're mechanical devices, and fail a lot.
Solar panels typically produce 10-15% of their normal power if it's cloudy. Adding a wind turbine or two can do a lot to make up for that, but then there's winter...
I'd very much like to see what their thoughts are in a year.
Adding a small wind turbine is usually not worth it. They need a lot of wind to produce any meaningful energy output while costing a few thousand $. So unless you go really big, you'd be better off adding more solar panels.
Solar panels typically produce 10-15% of their normal power if it's cloudy. Adding a wind turbine or two can do a lot to make up for that, but then there's winter...
I'd very much like to see what their thoughts are in a year.