I think someone mentioned having a tent.
If you're buying a tent... get a white top. If you get a colored top, everything under it will look that color. I once got an inexpensive dining tarp at a discount store, and the tarp was blue. I replaced it the next year!
'Nother thing. Is it likely to rain, and is your space going to be on grass? If so, you might want to scavenge a rug to use as a "floor" to keep your customers from standing in mud, and to give your items a relatively clean are to land on, should they drop or be blown off by the wind.
Can you get an inexpensive wooden drying rack to display your runners on? You might be able to set it on top of, or in front of your table. Maximize your available display space by going vertical.