[raketenjagdpanzer]

You know you say "Oh he'd only have WWII stuff and no guns..."

Consider this: even taking that into consideration, his "garage" is a treasure trove of a machine shop. It'd be a fine prize for any faction to take, be it civgov, milgov, New America, MexiCubanSoviet invaders, whatever. He's got tooling, lifts, lathes, etc. up there to keep an armored brigade repaired and running.

Now regarding the collection itself? Fine, He's only got up to Korean War era stuff, and no ammo. Taking it as fact (because it is a fact) that he's got the machine shop to do so, what's stopping him from pulling turrets off of tanks and hey, presto, armored prime movers? Attaching dozer blades and other things, and now you've got armored engineering vehicles, vital to combat engineer work and reconstruction? How about turning those old tanks into personnel carriers? Mortar carriers? A Sherman could shrug off MG42 rounds, why not RPK slugs? Same for his various half-tracks.

So you consider his 30-40 vehicles that he "would have" during T2k's timeline, we'll be really conservative and say 20 can be made operational, and hey presto that's 20 personnel carriers or prime movers, now suddenly you can put a brigade strength infantry unit on tracks versus walking everywhere, or riding in relatively thin-skinned vehicles.