Somebody willing to do anything positive for the hobby should be given as much support as possible.
Sounds like a win for the club and a win for the hobby. Keep a bit of an eye on him the first few times to make sure he does have enough skills to get people started. That's the hardest part in this hobby. Don't worry too much if he teaches the odd bad habit or two (within reason), finding people willing to help teach others to fly is such a gem, go for it!