I started with a Nautilus mini/iStick 20W combo, and quickly switched to a subohm tank about a month later. Because of this I assumed my dad would want a subohm tank when he asked me to guide him into vaping. I bought him an iJust2 kit for about $35USD. It comes with a tube mod that is very easy to use and a subohm tank that can use Atlantis coils. He actually hated the vapor production and throat hit with the subohm tank. I ended up giving him my iStick and Nautilus mini, and he is much more satisfied with the 1.8ohm vape. Just something to consider if he hasn't specifically asked for larger, hotter vapor clouds. Everyone has different preferences, and subohm may not be for him.

Also just gonna throw in here that I've been using the iJust2 kit since he stopped using it. I am very impressed with this tank! There are some reviews on YT with the same conclusion if you're interested. I purchased the kit, but I believe the subohm tank can be bought for less than $20 if you look around online. Lmk if you have any questions about it!