Mm-hmm, all valid points.
What are your ambitions? Do you know or have results of his hearing loss?
Do feel free to share so that the community can advise you without making assumptions over your ideas or goals. Generally for success in aural events, it is dependent on the nature of the hearing, if hearing aids are of use to him, so on again all dependent on certain facts.
Sign language however, knows no boundaries - anyone can learn.
