I was kicking around the idea a couple years ago. There's a national show that comes to the indoor mall in Peoria once a year. Pretty typical of most shows, I think...most venders have two or three tables, and you can buy anything from garbage can boxes to wall sconces to little shelves with key-ring hooks...the variety is endless.
The tables line the causeways of both levels of the mall. Little old blue hairs are bussed in, and their happy (or confused?) little old men follow them faithfully as they browse table after table of hand-made, mostly wooden goods. The parking lot is full of 30 or 40 3/4-million dollar motor homes (the big jobs, the diesel pusher Prevost bus chassis made into a motor home), and each one has a painted-to-match 40' foot enclosed trailer parked behind it. I assume it is full of each vender's garbage can boxes and little shelves.
So, being the enterprising guy I am, I looked into it.
This particular franchise (if you call it that)---the sanctioning body from whom you rent table space---charges something like $2500 per year to place in their shows, then they have the gall to charge you per table, per show, as well! And, if you didn't want to sign up for the year-long circuit, you could buy a half-year package, or rent tables per show. The cost per table per show was $400.00, as I recall. This was some years ago.
I am in the wrong line of work!
I hope you can find better, cheaper shows out there in your neck of the woods.