I like having unique pieces and RARELY make two similar items. Maybe if I want to keep one! 
We just did a show and I had 56 items of beaded jewelry. Plus we had a small covered glass case and a bowl with vintage silver items, etc. I hadn't done a show for over a year, so I did a 'practice' set up on my dining room table. You might be able to do the same? If it looks too empty, you can either make some more items, or elaborate a little on the display to take up some more room.
Have fun with it and good sales to you!