I've been developing my 4x5 b$w in the bathroom. I have a tiny bathroom with no windows, so I just use the toilet back as a bench and the sink to hold the water stop tray. Glad makes their Christmas storage in just the right size. I can even do 5x7 prints with some small room in the same "tray." They also last forever. 3 of those, a metronome app or website set to 60BPM, and a timer set outside the door and you're off to the races!