Quote Originally Posted by Red Tractors View Post
. . . Running water will be the biggest challenge. . . .
No challenge at all. Half of the six darkrooms set up for myself over many years have had no running water. Gallon milk jugs stored water in the room, and stabilized at the same temperature as chemicals and trays. A bucket carried waste water and chemicals to a drain. When good darkroom water conservation is practiced, fairly little water is required.