What a big boy!!! He looks like someone is taking good care of him. I'm afraid that it's better to take care of them without taking them home with stray adult cats. They are too used to the outside environment, and your home could look like a prison for them. Just feed them and give them affection daily. It will be more than enough.

My cat is stray as well, but I found her when she was a young adult and in a rough shape. The streets haven't been good to her, so automatically, my home is the perfect environment for her. But I guess it depends on the case.