Sending supportive hugs your way.
I'm not sure it would be effective but I did just have a "light
bulb moment" of sorts. Perhaps (maybe that should be in all caps...lol) it might be wise to say something like this:
"difficult child don't worry about what we say about calls and visits. Don't
worry about what the adults in charge say. We are all Adults.
Concentrate on what will help you make mature choices for your own life. You only have six months and you will be an Adult too!
The staff there will not be part of your adult life. We will
not be making decisions for you as an adult, either. Do what
you truly believe will serve you best because that is what we all
want for you. We want you to have the best life possible."
It sounds like he is so intent on game playing that he is not
realizing that he is not a little boy playing anymore. "Maybe"
if the can realize that the staff are adults working their job
and you and husband are adults near the end of the parent road "maybe"
he will begin to see himself as alone and needing to figure out
what kind of adult life he wants for himself.
Of course..........maybe not! DDD