Art Festivals

So I was just let go at my job of twelve years, and now I am trying to figure out what to do. Right now I have a part-time pet photography business, that I work at with my wife as my assistant. It was basically just something we did on the side to help support my hobby. I will now be pushing that job a little harder to see if it can help pay the bills more once I need it. I have also been trying to come up with other photography ideas and I started thinking about maybe trying to work some of the local art festivals in the Fall and Spring. This would not be as a pet photographer, but I would be showing more landscape and fine art type things. So just looking for some info from people who do work those kinds of events. Do people that go to those kinds of events buy a lot? Or is it more just get your work seen in the hopes someone takes your card and later down the road buys a print form you.
I don’t think it would be something I could be ready for this fall but maybe by spring I could be. Any info on the subject would be helpful right now, as this is the first place I came to begin researching it.