How much time is reasonable for work to be done

While I can't give an actual answer to the question, I'd like to mention, that using a mobile tech, can often be a more satisfying experience. I have only taken one of my RVs to a dealership, and service was done while I waited. In my experience, and reading about others experience, a call to manufacturer, can get prior approval, for warranty work at an independent service repair, or mobile tech repair.

Jerry