I would say 40# is plenty for a whitetail deer too...especially with a modern 40# youth bow like a Bowtech. Hogs have a much thicker hide so that may be iffy. Will kill a turkey for sure but thats a smaller target and also very much harder to even get a bow shot on a turkey than a deer.

If he cant legally hunt where you live due to age limits a ranch would be a great idea. Maybe you could talk the ranch owner into a cull hunt(much cheaper) for him and you could sit in a blind with him for the hunt.

** I almost got him but I refuse to take a marginal shot **