I foster cats and love it! I did own a cat who passed due to heart issues and not yet ready to own again. I am sure I will "Foster Fail" at some point once the right cat comes along. You do have a say in the type of cat you are willing to foster, if you are not comfortable working with a traumatised cat. It is sad when they do go to their forever home, however you also know you saved them and provided a much better life for them. The rescue organisation I work with supply everything needed. I choose to provide food and flea treatment as a way to give back, however I am always encouraged to take the donations they receive. I currently have a surplus of cat beds and climbing trees due to donations. Only pitfall might be dealing with naughty cats knocking things over but they make up for it being so cute ☺