Idea for an alternative income stream for the hotel: hosting slave-related events. A slave olympiad, if you will. Pick a girl with the submissive trait to enter them in as your partner, pick some events, and see if your sex stat with an RNG modifier beats the other girls (each competing trainer could have a hidden stat, with an added rng factor to see if they can beat you once in a while). Winning could earn money, unlock new slaves to purchase, etc. etc. etc.
But of course, that's all up to Runey and I'm just daydreaming.