Help us to improve our mini cat sanctuary

My sister and I are living together and we are currently taking care of 13 cats. 10 of them are rescue cats. We hope that someone can adopt a few of them but it's hard to find good foster home. We love all our cats so much and we want to provide at least enough food and comfortable space for them but it is quite hard with low budget. Currently we need money to get six of them to the vet for neutering. We also need to buy about five or six medium size cages and litter boxes. We can manage to buy their food and litter, but still it is quite hard especially at the end of the month since our income is not that much, even combined since I am still studying and my sister only work part time. We would greatly appreciate if you are able to donate some so that we can improve the living condition for our cats.