Really? I don't think my wife is strong enough to pull a train, maybe a small car at most?
Is there money in posting videos of other feats of strength?
It's the same all over. We've got exactly the same issues here in Europe.
One explanation that I've heard is that a lot of people have gone into the 'covid industry' and are working as testers etc. Better money than a lot of entry level/shop floor work.
Warrior Assault Systems do some good quality stuff at a reasonable price point.
https://www.warriorassaultsystems.com/product-category/armour-carriers/page/1/
I'd go for the M1 Carbine, mind you I've got one myself, so I might be biased.
Another option may be the Ruger PC carbine? They seem to get good reviews, and can be taken down, so should fit in your suitcase no problem.