Seriously, YOU HAVE 6 CATS! Why would you have all of them if you cannot afford a vet? Their health and well-being is YOUR responsibility. If your cats are sick, they need to see a vet. If you cannot afford to care for them, then you need to give them to someone who will take responsibility and provide proper care for them.
When I see questions like this, it really upsets me. People need to start stepping up and taking care of their animals.
If your child was sick, would you just stay home and not take them to a doctor?