His parents gross between 80-100k each year. 

I found this resource from the IRS website, and haven't read it yet in its entirety, but it does seem that he wouldn't be disqualified from this perspective: 

"You were not eligible for a payment if any of the following apply:
• You could be claimed as a dependent on another taxpayer’s 2020 tax return
• You were a nonresident alien.
• You did not have a valid SSN issued to you by the due date of your tax return (including an extension to October
15 if you requested it)."

https://www.irs.gov/pub/taxpros/fs-2022-22.pdf

I just didn't want to miss anything obvious and even bring it up if it was a stupid idea. 😉