Your friend needs to find someone with several style bows and see what he can comfortably shoot.
On a heavy weight bow, many archers partially anchor the string then push the bow away from the body to tension the bow. Your extensor muscles are stronger than the flexors in that part of the body. This style may help him, and works great with a compound bow. Then holding the string prior to the shot on a compound is easy due to the weight letoff.
45 years ago I shot left handed. Some time during thr interim I switched to right handed, but can still switch hit if needed, Your friend might see if left handed archery works.
Either way, 50 to 55 pound bow is plenty, either recurve or compound. Both can be had in take down, though the recurve is found more often.