Blast wrote:

>Manufacturing would shift to war equipment so new iPhones or >replacement parts for your car would be almost nonexistent. - >have sturdy equipment and spare parts.

That's a very good point. At the start of WWII the manufacture of cars for civilian use simply stopped dead. Try and get everyone in the family to use THE SAME model of car. The you can canablise for parts.
And fueless transport; a bycycle and trailer, would be very useful (and get a BIG chain and lock; they were prized things to steal)

Here in the UK we were under seige in WWII so we were short of everything. Onions were prizes in raffles. Soap was in very short supply. People had 'carrot tans' since tans weren't ratoned and people went orange. And many a GI found the gels all over him for a pair of nylons.
Look at what happened last time for an idea of what happens next.
qjs