As everyone else has said, you've got to plan for it. Where Solar really makes sense is in the South, Wind can be had almost anywhere. However, you really have to look at the local wind maps. You need a steady breeze for wind to make sense, not a lot of gusts. I'm pretty sure you still have to have batteries and a charge controller for a wind system (same as solar) and that's where your costs can spiral rapidly.
itís not only about the odds, itís about the stakes.