Opportunities like this come round very seldom.
Look at it the other way. He'll be looking after his Pa.
You can't go, so send him instead. 5 Weeks in July, No problem.
He'll catch up on the weekend, after he gets back.
Exams are late November aren't they?
He'll never forget it, either way.
And it'll teach him way more than 5 weeks at school will.