Is it permissible for a wife to disobey her husband who does not financially support her and their daughters despite his affluence, is inconsistent in his prayers, harasses women, does not provide household necessities except in exchange for money, and speaks ill of her? And are the daughters sinful for not speaking to their father due to his ill-treatment?

Your salary is your private right, and you are not obligated to spend from it on yourself or your children, as maintenance is obligatory upon the husband. If he is stingy, it is permissible for you to take what suffices you and your child from his money without his knowledge. You have the right to complain about him and take him to court to compel him to provide maintenance, unless he permits you to work in exchange for your spending on yourself and your children. He is not allowed to speak about you in an inappropriate manner, but his ill-treatment does not permit you to abandon him or deny him his marital rights, nor is it permissible for his daughters to mistreat him. His negligence in prayer is a serious matter, and he must be advised and reminded.