But happy instead of spending your life doing something you don't like and dreaming about "escaping the rat race".
Success in life is not measured by how much you own.
She can happily take over as managing partner of my firm if she wants and cash out or use that expensive school education to get a top job and learn to FIRE early; she has options.
If you can bear the thought of doing some other work, then getting a decent paycheck and having art as more of a hobby or side venture may be much more fulfilling. (And frankly, most people I know in the arts do all kinds of side jobs to pay the bills, anyway.)