How much to add an outdoor shower to our house's exterior?

We’d like to add an outdoor shower to our deck. To our knowledge, there’s no pre-existing plumbing in the planned area, as the other side of that wall is a bedroom.

Whether it’s enclosed or not makes a difference. Materials would include pex pipe, fittings, clamps, shut offs, shower head, and possibly a diverter. Price range would be $300- $700 with labor.