These come in different lengths and there is even a curved "corner piece". And they aren't expensive. I bought mine at the Lowes in Sherman, TX, and the 8 ft length was under $11. The legs are $2+ apiece and there is a bag of little hangers with screws that can be used in drywall to hang the shelf on before you add the legs. Altogether it was about $22. It takes two people and a level to put it up, but it isn't difficult.