Co-worker A is leaving to make six-figures at a consulting gig. She'll be traveling all week and just home for weekends. All expenses during the week will be comped. Co-worker B and I were telling her that she should "live" with her mom on the weekends since she would have essentially zero expenses and could save about six-figures a year.
Instead, A is going to get a bigger apartment (she won't be using all week), with a new couch (the old one has dog pee on it--I'm guessing the new one soon will also), and paying for dog care during the week (instead of the dog keeping her mom company for free), a new phone, etc.