There are a few ways to survive as an adult.

Work you ass off for some rich bastard and make them even more money, while barely affording rent.

Inherit massive wealth from rich bastard, become rich bastard yourself and make everyone else make you more money.

Or

Hitch yourself to a rich bastard and have them take care of you so you don’t have to.

If she wants to pursue option 3 and all that it entails, then good on her, and good luck.