wealthy people would not live on mars, because in the best case they would only have the bare minimum food, water and amenities to survive, but not the luxury lifestyle they know from earth. It would be like downgrading their life from a nice house in a city to moving into a run down campsite in the middle of the desert with rationed food and water, no shops, no parties, no business trips, no live internet, no epstein island and no transport to get out for a few days.