Ok, here’s an old article on making a darkroom in as little space as possible. It’s hard to read but if you click the pic you should be able to make everything out on the full resolution version. I would not recommend working this way, but in a pinch it’ll do. I myself had a bathroom darkroom at one point. Perhaps more on that later. Point is, you can make do with very little space. At some point you will need running water for washing film or prints but that can be done in daylight. Still carrying fixed, unwashed, wet, prints around your house is far from ideal.