help for Ahmed family

My son Faraz Ahmed has stage 4 aggressive bone cancer, which is aggressively spreading . His first chemo therapy didn’t work , now he is on second line  chemo therapy which is not working as tumor rapidly spreading .                                                                   We are now seeking immunotherapy option which is not covered by any insurance .My husband has been disabled for last 5 years, I am homemaker taking care of my husband and my son with 4 stage cancer and younger 6 years old son.                       During this difficult time I am seeking a financial help for my son’s treatment . Total approximately cost for this treatment will be in between $ 55,000 to $65,000 please help. It’s desperately needed .                                                                   Please also make doua (prayers) for my son’s full recovery and health .