Wonderful, I think you are doing what I hope most true cat caring people would do and definitely wish more others would, instead of screaming down the phone 'come and get this cat yesterday'. Although I find it always easier if you have what the rest of the family think is enough and the incoming cat looks exactly the same as one you have already have, then it can take a while for the family to click on there is another and then usually when the cats are daft enough to stand or sleep near each other and by that time it has a place in their hearts.
Not that I have done that you understand.