Call for Artists, Making Money at Juried Art Fairs, Craft Shows and Festivals
You might need adjustable width sides to conform to odd spaces, but if you don't, you can advertise that you're looking for a used Craft Hut, Trim Line or Light Dome with or without the top. Or specify that the condition of the top is not important. You should be able to pick up a frame from a good canopy that way. Then all you need is mesh walls to complete an indoor booth. You will also have to figure out a way to rig lights.
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