Someone sure likes their Tanks with all kinds of shit in it! 
around 3500 Liters of cargo volume…not bad, but damn, that Mass. Also, 4 enhanced electric motors in order to move that thing? uff. Yeah, I can see why you need mini-reactors, solar alone wouldn’t do at all!
In my game, I just finished customizing a luxurious RV to better suit my needs. Currently starting to move all my crap over from my base and my cargo-car, so it’s currently a little bit emptier than usual.
So, what to say…I’m not using Shards mod (yet), so i don’t have access to the storage battery Array for example, but I was considering to download it in the future. I do have access to my private mod though, which adds Cargo Crates, with a little more Volume

It’s basically a Cargo space, but with a crate on top, it can hold some more stuff than the cargo space while still being able to be inside the car.
Otherwise. The outermost walls are all heavy duty frames with heavy duty boards on them, plus military composite armor plating. The Inside is mostly plated with military plating, couldn’t find enough stuff to make it all military plating though.
Let’s see…Oh, yeah, it is a halftrack vehicle. The back has rubber treads, the front uses steerable armored wheels. The Very front of the vehicle is cut off from the rest with aisle curtains, making it safe to be inside without being seen, while still making the place usable for storage. The Middle part is mostly the living part, like in the RV it was based on, with kitchen, sleeping place, table and so on ; the back was, before the modifications, the sleeping area, i changed that to a workshop area where i can put most of my stuff.
I may, or may not, switch to a Tank when I see an intact one. While I like the idea of having a nondescript RV driving to the countryside, with all everyone could ever need in order to survive, i like the idea of a tank doing the same even more xD Not sure i’d go through with it though.