Help Me Treat These Kittens

Im starting a small organisation to save kittens that die due to infection or hurted by other animals. I'm going to build a small shelter in my garage and buy necessary supplies for these kittens. Currently I have 8 kittens. I bought in more but I cant keep them all due to shortage of money and space. Also they take a long time to fully recover and find an adopter. Please help me with anything so that I may build these kittens new house and make them adoptable.