Oh, my. I lost my Mother a couple of years ago when she was about the same age as the elderly gentleman you've been dealing with. Life can get confusing for them at that age.
Sounds like the gentleman owner might be a bit confused. He might have confused you with someone else he's talked to about doing his lawn. You might want to ask him if he has any local relatives and let them know that he needs attention.
I wouldn't worry about the bird not having a cage. I sometimes wonder why I continually put Mardy in her cage each night. If I didn't use the room after her bedtime I probably would just let her sleep on her playground.
I hope you do take the bird. I'm concerned about the elderly gentleman, but I'm also concerned that the bird may not get the care it needs from the gentleman. You might want to contact a local rescue and suggest they talk to the gentleman about taking in his breeding pair. Sounds like they may need help as well.
I would try to see if the owner has any family or relatives .
It's a touchy subject with the older folk when you talk about someone
( a total stranger ) coming in and making sure he has his meals , bathes , etc...
Maybe someone he knows can talk to him about letting nursing care
come in and help him with everyday things.
He will hopefully let someone else take the other birds and he gets the
care he might so desperately need .
Him alone and possibly being s little confused at times is a recipe
for disaster.
I nursed my mother back to health after she had a brain aneurysm .
She needed to learn everything and didn't want to go to a facility
that would help her with all this , so I moved back in , I was married to
my first hubby at the time . I refused to put her into a rehab against
her will , so we had them come to her. It was a long road , but she is
back to health and it's like nothing ever happened
Even though she has two more aneurysms that are inoperable , they
shouldn't affect her for the rest of her life. I found her the first time ,
I couldn't even bare it again. Let me tell you about fear when I call
her and she doesn't answer the phone !!
I live only 50 miles away , but still , my heart just stops...
So , this older man needs to be looked after him. JMO.