Have you considered a tray ladder (do a search at bhphoto.com on "tray ladder" and you'll see a few examples)? I could imagine doing the single-tray thing occasionally for big prints, but as a regular process, I think it would be a real pain. Three trays take longer to set up, but are much quicker to work with, and will give you greater productivity per session.
I work out of a dark/bathroom, and you'll discover efficiencies along the way that will allow you to speed up the setup/breakdown time. I also recommend a changing bag for loading film in daylight tanks to give you some more flexibility and less need to work around the family's bathroom schedule.