Thanks again for all your help, everyone! This has been enormously helpful.
Turns out one of the craigslist Beselers is close by (next suburb over). I emailed them, they say they have TWO of them, which suggests to me there may be a complete darkroom setup lurking out there. The husband is out of town for a couple of days, so I'm supposed to hear from him mid-week.
Might be the perfect setup!