I plan to use a tree as well to display some garlands I make that are prefect for wrapping around a Christmas tree. My tree is very thin compared to a standard tree, and stands 6 feet, so it doesn't take up much space, but still gives the right look. Mine is not prelit, but will be decorated with some glittered balls and grapevine as well, as I don't believe having additional decor will take away from the items I am selling, but rather make it look more like a tree someone would show in their home. I think it would be a great idea to showcase your ornaments, and give your display additional height.