Kitty rescue

I'm raising money, food, litter or medication for the 14 cats I currently foster. I have been fostering cats for over 2 years now, rehoming them is a difficult one as people prefer kittens and mostly dogs. I don't have a reliable income but I always make sure they have food and litter. I keep them indoors as the outside world and people are cruel. Because of my low income the litter trays can't always be kept super clean and I know it's not fair on them but it's what I can afford. Some of the cats were no longer wanted by their owners and so I've taken them in so they don't get admitted to the SPCA where they will be put down. I don't like asking for money or help but it's getting a bit desperate, any help will help, small donations, kitty food, litter, dewormers or flee medication is all a big help. I have asked other organizations for help but I do understand they are also struggling as it is a constant mission to rescue animals. Please help me to help them