She should try moving to a lower cost city with good public transport and good job opportunities. If she doesn’t have to use a car, it saves a LOT on gas, insurance, maintenance etc., With just that alone, she can probably rent an inexpensive place.
I am weak on family law; does the law not provide for alimony for someone in her situation, especially if her ex-spouse is well off? If she spent her life as a homemaker, she deserves that in any sane society.