just wanted to add a couple of info tips for future reference if he takes to it...
Definitely point him towards this forum. There is a WEALTH of information here.. loads of people that will help answer any questions or concerns he may have (and we all have them in the beginning) and he can also learn about the various other options and varieties of PVs and juices that he might like.
Remember this takes time. I switched to save money. I also was a 2 pack a day smoker and loved to smoke. Never intended to quit. I kept smoking a few cigs a day for months.. and suddenly, after I found the PV set up I loved and the juice I loved.. I just quit..easy peasy.
Drip Tips scared me at first. The thought of putting my mouth on an 'open ended' atty (or tailpipping as some called it) scared the daylights out of me. I started with carts.. then tried cartos.. then when I finally used a drip tip... LOVE IT. I use it most of the time. I still use cartos occasionally, but have found I like the Mega Ego Cartos best. There are many styles, and everyone likes different ones.. for different reasons.
The Boge cartos sound like the easiest route for now. Don't overwhelm him. There are as many juices, vendors, batteries, cartos, and combinations, as there are opinions... and every person will have their own ideas as to which is best

Your dad's opinion is the one that matters most. Go simple to start.. and let him take it from there...
If he does come visit ECF.. let him know about the PIF subforum.. we love to help new vapers!! (pay it forward)
Best of luck!! We are rooting for you!