When you rent a lens, you take it with you and use it when you want it, even if it is 3 o'clock in the morning. I always had my own darkroom, even if it was a walk-in closet without running water. For a while, the upstairs bath in my home was "bath by appointment only" for the other 7 members of my family. I am by nature a night owl as I implied above, so there was not often a conflict, but I do remember some screams of anger from one of my daughters early i the morning after I had left prints washing in the tub.