Help my 5 month old kitten who has FIP

Please help Teddy! I began fostering Teddy from a hoarder/breeder raid when he was just 8 weeks old, which quickly turned to adoption as he filled a piece of my heart I didn’t even know was missing. He was diagnosed with FIP on Monday - a fast progressing potentially fatal disease if not treated ASAP. I have found a treatment called Mutian that can aid in his treatment with incredible success stories. Every second matters so treatment must begin ASAP, lasting for 84 days. With that said, this treatment is unbelievably expensive ($561 for the first two weeks, $1200 for the month), so any help is deeply appreciated to allow me to get Teddy the help he needs. Please, please, please help me save my sweet Teddy Bear. Thank you so much!