The castle and either the gun with no bullets or the motorcycle would be the more responsible answer. If determined enough, you could eventually get it to where you could make bullets but you could also eventually get it to where you could refine compatible-enough fuel from organics or something.

If the DeLorean is the variety with the time machine and the time machine itself doesn’t need any special fuel, then that changes things of course.

But fuck it I’ll take the lsd and the vape.