It's an interesting design. I assume it is intended for the client to put up himself. All the pieces look like they can be flat packed and hauled home in the back of a truck.
The only thing I question is the bottom rails. They look pretty long and maybe each one should actually consist of two lengths butt jointed or sleeved into each other.
That would also allow for customized sizing and the client can buy a kit based on length of coverage needed,