Seriously though...
You guys crack me up w/all the "creative" choices you've entered into this thread.
One thing I noticed was an overwhelming choice for Diesel engines - that's great and certainly the best choice for maintenance AND for fuel availability. Also, diesel stores well and that battered 55gal. drum over by the chicken coop in the middle of nowhere, 3rd world is probably good enough to fire up your vehicle. Gasoline goes bad so fast in hot climates I'd use diesel myself.
I guess we're all romanticists at heart and masochists on a daily basis if we choose Rovers and/or ex-military vehicles. I love my 109 Land Rover and I trust it implicitly because I personally rebuilt every nut, bolt, and rivet myself. And I've owned it for almost 30 years now - But, I'd never drive it more than 100 miles a day because it's so uncomfortable for anyone over 4'6" tall. If it's not fun, why do it?
There's a bunch of great old military spec machines and many would seem to be excellent candidates until you try to go across a border ck point between warring countries. You might get your vehicle impounded or refused at best. Ex-Mil vehicles done right might be civilianized enough by painting - but parts for a H1, Pinzgauer, Volvo c series, etc aren't in every 3rd world's (or Industrialized world's) parts store. And you're gonna need that part to get home...
As much as it pains me, I think the best vehicle would be a Ford or GM 3/4 to 1 ton truck chassis equipped w/4x4 and diesel engine. Probably a manual gearbox because they're easy to field repair. Parts are current and either in stock or easily shipped from a zillion locations worldwide. Do a custom bed/camper like the Turtle 5 and you could go anywhere in the world you wanted without raising eyebrows at the border and get replacement parts easily (if even needed). And if you get jacked along the way you go buy another one just like it. (Wouldn't you be P.O'd if someone stole your pride and joy you spent years and a bunch of money on while you were traveling down in Patagonia??). You don't want to have too much invested in a vehicle you are using where people don't have insurance and/or D.L.'s or where the local militia thinks your ride is better than their ride - remember THEY have the auto weapons, not you.
A couple strategically placed stickers from this site along w/your favs would put some of the romaticism back into the equation and you and your family would be safe and comfortable in the ride as well.
But, I do know where we can get some cherry Saxon APC's with ultra low miles if you guys want to do a group buy!! :smiley_drive:
Safe Travels
Cheers!