Give this boy a lifeline

This young boy, Manaksh Singh (16 years old) was full of life like any teenage kid until Sept 2018 when he had excruciating pain in his knee. After several tests, the family received the most shocking news of their lives. Manaksh was just diagnosed with a rare kind of cancer (Ewing Sarcoma). The cancer had spread to five different parts of his body. Needless to say that the family was devastated at the news.
       This young jolly kid, now under shock, faced the situation like a fighter & has so far gone through 8 chemo therapies and the family has been paying huge bills until now. His cancer is under control now but he needs a surgery for his femur bone replacement (with an expandable prosthetic).
        His surgery is expected to be in May/June 2019. Please help this boy so that he can get the treatment he deserves & get back to his goal of becoming an engineer & be able to live his life.