I'm sure you've already checked... but I do hope you were 100% certain all cats you take in didn't already have families. I'm mad on cats, I've always been around cats my entire life, I've even got a baby photo of my parent's cat refusing to let my parents near me! I always make it a point to always get rescue cats. I love my cats to pieces and would be devastated if anything happened to her, but I'm the polar opposite to you both about the indoors/outdoors issue - I don't want to get into the subject as it's not the point here but I have extremely strong feelings about letting cats outdoors. Just as well, my cat *loves* being outdoors and is utterly miserable if she's kept indoors so I let her out anyway. My cat also hates collars, and I did try to put one on when I first got her, but she just rips it off - she knows how to bypass the safety release, and I refuse to use a collar without a safety release. She does have a microchip, and she's fully vaccinated with yearly boosters, and taken to the vet straight-away if there's any issues so she's healthy, well fed and doesn't look like a stray. However, a couple times already, a few people assumed she was a stray and started to keep her. I've had to go around knocking people's houses trying to find her and getting her back. I've lost a cat in the past because a family fed her and gave her space away from my current cat (which is as mad as two hatters and hyper). I found her, and tried to take her back and she was so unhappy, so I had to give her back to the family after a week, that broke my heart, and I only had her for a month! I asked everyone that tried to keep my cats why they tried to keep him/her while he/she is v. healthy, no fleas, well fed, has a microchip, etc., is that "Oh he/she doesn't have a collar". Sigh. I see their point, but still a well fed, flea-free cat tend not to be strays.
So again, I'm sure you both are doing this, but I do hope you make 100% sure the cats you take in doesn't have families already

Good luck finding lovely homes for the cats - I know you both will make sure they go to good homes! I would love to take in a couple of your cats but my cat is fiercely independent and will NOT be happy to have another cat in HER house! That, and the small issue of me being on the wrong side of the pond...