An item that can quickly eat up your tablescape budget are those beautiful speciality linens. I am not discrediting the aesthetic appeal to a rich linen; however, if money is on your mind, then there is always a solution.
Here are some unconditional takes on table coverings:
A simple white poly cotton linen shown here with green ribbons weaved through one another to created a clean overlay.
Depending upon the texture of the table that you are working with, you may be able to get away with not covering the entire table. In which case, utilizing runners can add a pop of color.
Another option for partial table coverage are placemats. There are so many wonderful prints, textures, colors, sizes, and shapes of placemats these days that you are guaranteed to find something that fits your theme.