Get it down on paper before you talk to him or the counselors.
We will pay costs of an SLE/Oxford house for X amount of time. (If I had had the option of SLE and my parents paying without a time stipulation, I would not have been motivated to get a job ASAP)
Coming home is not an option, or coming home is an option for X amount of time to find an SLE.
I have found with both adult daughters that if I leave it open to interpretation, ie. "until you get a job", that's when I get mowed over.
I did that with the AD when I took her in during that month.
She ran roughshod over me.
Have clearly defined boundaries and time periods.
Just my two cents.