When you get to plumbing your sink, the mistake I made in my first darkroom was to put the faucet/fixture unit in the sink. That takes a lot of space. This darkroom I installed the faucet and knobs up high on the wall outside the sink so I have more sink. I have to reach up pretty high to turn the water on and look up at the thermometer but it beats having all that and the hose connections in the way.
Dennis