Kim, I hope you know that we all support you know matter what you do. You know the circumstances concerning your health and your home situation. You have to do what is best for you, family, and kitties.
It's not like you dumped them in some horrid place! You have turned them over to what sounds like a great group who will find them wonderful forever homes. Since you know this person you will be able to keep up with what happens to them.
I know this was an incredibly hard decision to make. You do what you have to do and know that we are always here to support you. You have helped so many and now it's time to take care of yourself. You can't be there for your remaining cats if your sick. Your family and kitties need you and you can only be there for them if you are well.
Take care of yourself and we love you!!!