Help my mom with her bills and treatment

My mom has been sick and started to get better. Her cancer is back at stage 3 and she is doing intense treatment. Her insurance will only pay have of her treatment and it is $3000 a month. It is hard on my mom, and my family. My mom is in a lot of pain and some days she can't even walk due to the pain. I try to help as best as I can and I hear my mom cry at night because she is in so much pain.My Dad is a teacher and is working hard, stressed with bills, making sure we are doing ok, get to sleep on time, makes sure we are fed, do homework, and showered. It is just very hard on our family right now and puts a big strain on my Dad to help pay for things. Anything would help and would be greatly appreciated. Help if you can. My family thanks you for anything you can do.