I did not like to setup a temporary darkroom. Setup takes just too much time. For years my darkroom was an old and small wardrobe standing in a little room without windows. There I had everything setup (you anyway need a space to store all you darkroom stuff, so why not make that space your darkroom.) I used one tray development a lot. After the fixer was back in the bottle I walked over to the bathroom for washing the print. That worked great and the time overhead for setup and cleanup reduced to cleaning that one tray. So sometimes I even used it to do just one single contact sheet.
But honestly ... over time I could manage to use the whole little room and that wardrobe went out and this summer I am going to setup a darkroom in the basement.