I agree that it's a good idea to make a good selection of different kinds of hardware available to him, and different flavors of juice, too -- but don't have any expectations; he'll use it or he won't, but you can't make him, and if you try, it will just set him harder against the idea. People make life changes more willingly when they think it's THEIR idea.
Andria
ETA: I also don't think it's a good idea to have a still-smoker try WTA; WTA is most effective for those who've already quit smoking, but find vaping somehow lacking... if he is still smoking, WTA won't seem any different from any other kind of ejuice, and he'll never be able to learn if he really needs it or not -- most don't, obviously. You only notice the difference of WTA when you've been using just-nicotine for a while. Not everyone benefits from WTA, and it seems to me that those who benefit LEAST are those who are still smoking ANY amount. (because WTA is no substitute for the commitment to quitting -- it won't do squat for psychological addiction, only for physical dependence to those other alkaloids)