Most Mech Mods are future proof because they have no chip to fail. I would grab a couple of Cheapo clone Tube Mods for your Vapocolypse box. Stay away from the Hybrid Mechs where the atty has direct contact with the battery. Learn Ohms law, basically build higher ohm coils above .6 ohms and run the proper batteries. Add a couple of RDAs and RTAs so you don't have to buy coils. DIY your juice. This should all future proof your vaping pretty well. As far as regulated devices, I have an IPV 3 LI that is about 2 years old that someone else used and gave to me. Still going strong, but there are a lot of under $50 mods out there that will last you a year or 2, just grab 2 or 3 or 10 different ones that fit in your budget.
My plan is that once all my regulated devices fail, I will break them down and take working parts from each to make myself one Mega Frankenstein Mod