Thank you all for you help. It has made me realize that I didn't need to cut off ties with my family members.

I had the opportunity the other day to stand up for myself and let them know that I'm tired of being manipulated by them and constantly feeling worried about their futures. I told them that I've done all I can to help them and that I need some time to concentrate on my life, and would they mind not dumping their problems on me any longer.

I actually got an apology from them! I think they knew how much it took for me to stand up to them and they agreed they had been dumping their worries on me.

My sister and brother-in-law somehow got his parents to pay their late bills. He's been actively looking for a job the last couple days. And Mom has knocked it off with her nonsense when I talked to her yesterday.

For me, this has been a miracle. But, I wouldn't have done it if it hadn't been for you nice people. Thank you all for your replies!