This probably does not help but it may be a low cost solution till you come up with the high priced approach.

We can't put up any permanent structures so our fequncy pole is made from door/floor molding that costs about $.30 a foot and comes painted white. Then we mark off with a sharpie and write in the numbers. Clothes pins are used to designate channels in use.

A tube is attached to the pole with plumbing strap. We put a headless spike in the ground and slide the pole over it. The same approach could be used by hanging the piece sideways. Total cost about $12.