Help Lynx with vet bills and treatment

Hello, my name is Bree or some people know me as Mokono online. I've been struggling for a long while now financially and now even more than ever it feels. I work full time at a fast food restaurant but it barely covers my rent alone. Things have been increasingly harder to afford and manage to find other work. I've been severely struggling to stay afloat, and now suddenly my cat has gotten severely ill.

She is only 5 years old and had an emergency vet visit on 6/24/25 that costed around $1,567. Unfortunately even with said visit her situation still isn't improving and with what we were told, her best option is a blood transfusion which is around $3,000-$4,000. This is due to her red blood cell count and other vitals being extremely low, making her lose weight but they are unsure of why there's so much fluid building up. I can't lose my precious baby and any donations would go into a savings account for more vet care.

The symptoms and problems she's been having is:

loss of weight/muscle, fluid build up in the abdomen (which I believe she has more building up that needs to be looked at and most likely drained again asap), constipation, low vitals and low red blood cell count.

They believe it may be some sort of parasite but they didn't have a definitive answer. The most likely case she has here is sadly (wet) FIP, which would require long term treatment or else it is fatal and I would sadly have to put my 5 year best friend to rest.. It isn't unlikely as one of the other female kittens from the same litter developed (wet) FIP as a kitten and sadly passed away from it as there wasn't a lot of treatment options for it back then, but Lynx has a chance now if she can get help.