Spay ang Nueter strays

Hi, My name is Cathy, I'm a single mom, and the breadwinner of our family. I Rescue and take on strays cats since i was 10 years old, but now, they're numbers are growing, and some of my rescues are pregnant, currently i have 12 cats in my care, including the pregnant ones. I am asking for your help so that i can have them spayed, so that i can continue rescuing more. Thank you