Only God will reward to you. You have been doing very great job for a long time why are you accepting defeat in the last, you will have a god blessings very soon (Inshaallah), please dont do such a thing from which your hard work, efforts, care, troubles which you have been facing from 40 years become waste. And one more thing that nobody can have ability to take care of anybody only god is there who takes care, Only god was there who had been taking care of your daughters and after you also god only is there who will take care of your daughter. You can say that saying is very easy but when we come to practical that is very difficult then I will say that I am not saying oral I have experience I also have one this type of girl so please be patience.