Children troubling elderly parents, how can parents stop it ?

I am 52yr old women and my husband(progressive supernuclear palsy patient)is 65yr old. I have 5 children(elder son 38 yr old,elder daughter 36, younger son 26yr old, middle daughter 22 yr old and younger daughter 21 yr old). No one is married and pension of husband is about 20000rs. Do not have other source of income. Problem in my family is elder son and elder daughter are out of my control. Both have different way of torturing family. Elder son do voilence in home. Sometimes he harm himself or me and daily take 500 money else he will do voilence or broke costly goods. When he go out Elder daughter take one or another topic and start quarrelling and making rules of her will like which neighbor will come home otherwise she will start quarrelling and shouts to insult the family in colony. She is taking 5000 rs monthly and kept one dog in seperate room in which no one will enter. Husband suffering from PSP whose medicines are of 5500rs. Plz tell how to get relief from both.