Kitty is sick! :(

Hello, my name is Nichole and I am starting a fundraiser for my cat, Kitty. I adopted him in the beginning of February at a Petco that receives cats from the Miami-Dade shelter. I fell in love with him and felt bad for him because he was sitting in a dirty cage and he looked all mad. I asked the workers if he was sick and they said no, he is perfectly fine and has no history of any sicknesses. I took him home and within an hour of having him, I noticed he was sneezing a lot. I thought maybe it was his bowl, so I bought a new one, but he still kept on sneezing. I contacted the Miami-Dade shelter and they said they would be able to take care of my cat. When I got there, they said he probably has a respiratory infection and couldn’t do much, just gave me some medicine. I gave him the medicine they provided and he got a little better, only having minor sneezing. Recently, he started to get worse to the point he is choking on his food and wheezing. We took him to the vet and they said it might be a bunch of stuff and that I need to schedule an appointment that’ll cost $300, plus his antibiotics which are $80. They honestly don’t even know what he has yet and I am scared he might have something serious considering he is non-stop wheezing for air. I’ve bought multiple antibiotics online, had him sit in the bathroom for steamy showers, and used a nebulizer. I got the cat with the intention of giving him a better home and thinking he was healthy. I currently work a job that barely pays anything and I also have to pay for bills and groceries by myself, plus my cat’s necessities and mine. I really don’t have that much money and anything would help.