@CalamityJane,
They are almost all rescue cats. We were once up to 35 cats, now down to 17. Most are in their teens, 3 are 20 or older, and a few are younger than 10 (one is maybe a year old now).
My wife and I always say "OK, this is the last one...!" until the next one comes along, helpless and hopeless.
They all live long, healthy lives (as much as we and the best vet on island can give them).
One of the 3 outdoor cats isn't really ours; he belongs across the street but drops in for breakfast, supper, and singing every day.
I have several cat essays posted on these forums.