We made a hinged ladder roost. There is a fixed roost bar at the very top of the roosting area as well. The hinged ladder roost is heavy, but, we have an eye bolt on bottom, and pulleys above. When we need to clean it, we put the hook into the eye bolt and raise the roosts, we tie it off to keep it up. Clean, then lower it when done. This ladder roost sits on two pieces of wood that protrude off of a wall stud on either side. These supports only protrude enough to hold the roosts, so they are not in the way.
in our run, we added roosts that are 2x4 with narrow side up. We bought the metal deck supports that hold a 2x4. Normally, with deck construction, you would screw the 2x4 to this metal support, and metal support gets screwed into the vertical structure. So that we can easily remove the 2x4 in the run, we only screwed these supports to the vertical posts holding up the roof, the 2x4s just sit in the supports. So, in a small set up like you have, where the width of the boards is easily handled, you could just use these supports that allow you to remove the roosts when you need to clean, without needing to build a roost structure on a hinge.
An example from the internet of this type of metal support. They are inexpensive.
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