Please, help saving my fip cat

Nice to meet you all, my name is Sophia, currently studying university. I’ve kept two little cuties, which are both rag doll and brothers. Nathan and Ethan are so adorable and always ask for huggy and sunggle. However, Nathan has started to behave different since yesterday, he refused to eat, drink and go to toilet. I have decided to take them to the clinic just as I noticed something went wrong.

After diagnosed by the doctor and the blood test, all the evidences have pointed to that Nathan has been suffering from fip, which is fatal to cats, especially Nathan is only 6 months old. Doctor said that he needed to make immediate suction, to clear the fluid in Nathan‘s chest and abdomen. After the surgery, the doctor has clear a whooping 80 ml of fluid from him, and inform us that Nathan has to stay in the hospital for monitoring. He also told us that fip is cureless in this stage, and we have nothing to do except to make him feel better.
At the end of the conversation, the doctor has mentioned that their is one experimental drug called gs-441, and it is Nathan’s final chance. After researching about the drug, it does have examples that can cure fip on cats, and we have decided to give it a try.

Gs-441 currently do not have a legal way for purchasing in Hong Kong, the doctor said that we have to import the drug in other countries. The price of the drug is just too high for me to bear, it costs about $600 hk dollar per shot daily, and it is a 12 weeks treatment. Also, the clinical cost is also a big burden, it is the second day for Nathan in the hospital, it has already cost over $30000, and the cost will just keep getting higher. As a student, not only I have to pay for the student loan, but also the living cost. The extra medical expenditure is just too much for me, I hope that I can get help from you guys.

Nathan and Ethan are just like the gift from the heaven, they are so perfect and precious, god, please don’t take him away from me that soon, please let him stay with me till he grows old.