I hope that some good possibilities for how to deal with the problem where you are come up if you ever need them again. It is daunting for sure, and it is wonderful that you have tried to help these poor cats already.
On a happier note, one of the coolest homes for cats that I have ever seen is called something like the Cats’ House, I believe in Diego, California. A childless married couple has taken in about 10 to 15 cats over several decades in their home, and they have designed the house over the years to be “cat friendly”! It has elevated tracks near the ceiling, among many other features, to let the feline residents zip all around the house, into any room whenever they want. The couple has published several photographic books of their endeavor, and it looks as if their rescued cats (there is a dog or two as well!) think that they have hit the jack pot.
Cleocatra looks at me with that expression too so often, like she is thanking me for having a good, loving home. It is just priceless!
I meant “San Diego,” sorry!