From what the guys on here tell me (and there are some very intelligent people here), he won't keep the gains from an oral only cycle.
I have an ungodly fear of needles, but I was able to pin myself for 10 weeks on a cycle. Make him read up on IM injections, show him how small the needles are (I used 25G), etc.
Disclaimer: I am just giving you a heads up, not necessarily condoning AAS use. His diet and routine would have to be solid first.