All the rescue centres are usually over run with kittens, granted they will charge to make sure they go to good homes but while cats are much cheaper than dogs they still cost to keep with such things as injections, vet care etc. I took on my neighbours cat when she left and then found out he had health issues including a heart murmur but he is worth every penny but he cost me about £200 in vets fees. I now have Healthcare on him, which is not insurance as such as he can't get that with pre existing problems but it covers vaccinations, flea and worm treatment etc