Is a woman who has a small amount of money obligated to spend on herself, or is her expenditure the responsibility of her mahrams? And is her expenditure obligatory upon her family if she is wealthy?

If a woman is wealthy, her maintenance is not obligatory upon her relatives, because maintenance is for solace, and a wealthy person is independent of it. However, if her wealth is insufficient for her maintenance, then those of her relatives who are responsible for her maintenance must complete it.