Right about NOW, you are probably wondering how an average person can provide credible armored support for themselves, without spending the whole kitty. An OT-64 SKOT, a Polish/Czech armored personnel carrier can be sourced for about $15,000 USD in good, refurbished shape. Shipping is a few grand more, depending upon where you live. Parts for such Former Warsaw Pact vehicles are actually obtainable in America from logistics companies that handle that sort of thing. The drive train components are common Tatra truck bits, I hear Tatra Canada does engine overhauls. This is the price of a gently used Camry, all in. That is an IMMENSE amount of capability for the dollar.
Another path to take to armored vehicle self sufficiency can be found in the used armored car/cash in transit vehicles. These will actually "blend" a lot better than former Warsaw Pact vehicles, but may attract other attentions from criminal elements looking for the presumed loot inside. Trust me, they won't consider your life worth a plug nickel... that is why you want one, yes?
To get an idea of armored vehicles, I suggest you tour the Aberdeen Proving Ground Museum at some point. There is more armor on display there than in any other place I have seen. Some of it still bears scars from the WW2 era. Think about all the complex pins, linkages and just how crazy it would be to swap out major parts, like transmissions or engines. Civilian armored vehicles are really quite similar to the chassis they are built upon, chances are if you can work on one, you pretty much know how to work on the other.
What kind of ballistic protection do they offer? Well, you probably need to do a mission analysis for yourself to determine what the need is, rather than the want. Capability costs. The right decisions can allow you to maximize the benefit for your budget expenditure, so you can put resources to maximum use. Keep in mind, these things WILL use up parts a LOT more intensely than a regular version of the same chassis (for armored cars). They will handle a lot differently, and use quite a bit of fuel.
In conclusion, when things start to get really crazy is too late to consider buying your own personal war wagon or supplies to uparmor an existing vehicle. Such items will allow you and yours to avoid the fates and getting seized at unannounced, extra-judicial roadblocks. Those NEVER end well for the unawares and unprepared. For those interested in a look into the Brazilian kidnapping industry (which prompted me to write this), please read THIS article at warisboring.com . This is what civilian ownership of such is able to prevent.
Even if contemplating an uparmored vehicle for yourself is not in the budget, at a minimum, a prepper can take basic steps to make their vehicle more SHTF durable, as mentioned previously in this post by simple and lower cost modifications such as buying "Run-Flat" tires
Military grade bullet resistant fibreglass panels can be installed using simple carpentry tools.
P.S. - Check out http://www.washingtonbluegray.com/ . They have annual events at the Cal Ripken Stadium in Maryland. if you are interested in this topic, these guys are an interesting bunch. And yes, last I checked, a member there had an OT-64!