If you're looking to stock up for a decade, as far as chinese regulated mods go, you better buy 8-12 mods with 510 connections (not pods or pod mods) of various makes and models.
Then you need to baby them, and that includes toning down your vaping. The higher wattage you vape, the more heat you generate on the components on the board and that heat will degrade those cheap Chinese components faster than someone who vapes 30W or less.
Regardless of type of battery cap, baby that cap.
Of course you'll need to buy some 510 tanks and RTAs.
Obviously mech mods can be more durable, but they don't come without their issues. Plus, mech mods aren't for everyone.
Good luck.