Sensible SHTF Vehicle-Good and Cheap??

[2ndAmendican]

My wife and I have been discussing buying an extra vehicle whose express mission is to get us the hell outa dodge if/when things go south, and we can not maintain security at home. I may be going overboard, but I am thinking about older vehicles with no real electronics on them, that would be easy to repair and/or impervious to EMP. I know that may sound stupid, but I figure if I'm going to invest in something to help save our lives, then I want to plan for most any contingency.

Here's my list. It needs to have:

1) At least enough room for 4-6 adults, one dog, our gear, extra fuel, etc....
2) reasonable off road capabilities, 4x4, winch, heavy bumpers, extra lighting, V-8 or turbo diesel for torque/pushing vehicles out of the way.
3) Easy to repair/maintain.
4) Preferably something that is or can be made EMP resistant if not completely shielded. (and no, I have no clue if that's even possible.)
5) Would prefer an automatic due to my wife having rheumatoid arthritis, and driving a stick isn't easy for her. Not mandatory, but prefered.
There's probably 20 other things that I can't think of right now.

Blade, or any of you have any ideas as to what might be a good fit, that doesn't cost a fortune to build/buy?

We have thought about older late '60's International Harvester, Ford Bronco, Chevy or GMC Suburban, Mercedes Unimog, military deuce and a half, etc...

Wouldn't mind a military Humvee in the right configuration, but damn they're expensive!!!!

My wife is partial to the Unimog. A friend who owns one took us for a ride, and she loved it's capabilities off road. Very simple vehicle. Diesel engine. About 2 feet of ground clearance. Minimal electrial system. Kind of like the AK of the off road world: Simple, durable, and reliable. The prices aren't too bad either. Between $5000.00 and $10,000.00 depending on year, options, and engine type. (gas or diesel)

What do you "experts" think, or what do you have for such an emergency? What am I overlooking or missing? Am I on the wrong path? Thanks for any and all info and help.