Helping My Mom Medical Bills cancer & heart fail

My mother, Jennifer is my bestfriend. She has been sick for a long time now Diagnosed with terminal cancer that’s caused other health problems as well and has always just kept working, no matter what. Even if it meant missing appointments/treatments putting her own health at risk sometimes because she needed to provide for us. She has been a single mom of 5 kids since the start, life was never easy but she did her best to make it liveable, she could work and survived the struggle like all the other strong single moms. Even after all of her various diagnoses and treatments, she still tries. (She is stubborn and wants to be independent) Last week my mom was at work and her feet and legs swelled to the point that she had to go to the hospital where they found that she is in heart failure and kidneys failing. Her heart is working at about 25% currently. The Drs. have advised her that she is no longer able to work. I do whatever I can to make money & have been paying most of my family’s way since she has been sick, doing my best to help provide for her and my family helping cover bills, food and anything else when I can. I have guardianship over my 15 year old sister and have been providing care for her to help ease my moms load. But her upcoming medical needs and the defibrillator she needs to keep her heart going and keep her alive insurance has denied, are just out of my reach right now. It’s 100s of thousands of dollars and it needs to happen fast as she’s been fighting this battle for awhile and losing everything from homes to jobs to it. If it was in my power, she would have it, so I am humbly asking for any extra help that could be given for my family. Any and everything Is appreciated, all blessings will be paid forward God bless!