I have a friend who makes money selling his art on Ebay. You can also get rolling on Facebook, and post your art there. Here, there is a huge art fair in the summer, and the poorer artists set up on lawns just outside the fair. Our town also has an outdoor artist's market near the farmer's market, and artists aren't required to rent a booth all summer, only when they want to set up. It's nice because folks can browse after veggie shopping and not always see the same artists. So, if you have a decent farmer's market you might start a movement for an artist's market. Also when we have street fairs like july 4th or etc. some artists set up booths. If you feel your demographic is really kids, you might try setting up at maternity fairs. If you do a lot of work with animals you could market to vets or pet owners somehow.