Cable Rails: Archi Porn and Other Budget-Busters
Ok, this is some seriously sweet hardware:

This is a product called “cable rail” and it’s designed to replace standard wood or metal pickets. It’s great because it allows light an a nice unobstructed view. The photo above comes from a website of the company Feeney Architectural .

They also make a fantastic canopy product:

The canopies could be an alternative to covering the stairwell on the west side of the ADU. It may be a bit futuristic for the ADU design, but the steel cable would be sexy.