In this case I'd say not needing to be in a particular place to keep up with one's responsibilities, plus having any kind of access to a second house—owning, ac

In this case I'd say not needing to be in a particular place to keep up with one's responsibilities, plus having any kind of access to a second house—owning, access through a family trust, having the kinds of friends or family who own the kinds of homes at which long-term house guests are fairly normal and don't inconvenience anyone involved, that sort of thing—are more relevant than liquidity per se. Though cash would do just fine to buy or lease those things. My point just being the "liquid" part isn't necessary.