Your faction sounds like it will be great. Please share it when you're done. :)
I've made a few missions with scripted tasks (usually involving triggers placed on the map) but I don't think any of them would be persistent due to the nature of how ALiVE persistence saves. They're designed for either SP or single session saves. YouTube is an excellent resource for this, as is r/armadev on Reddit and the mission editing and scripting section on BIS forums for general questions on that stuff (I've asked quite a few myself!).
I don't really know too much about real life weapons and gear. I mean, I can recognize shapes and patterns and general aesthetic, but let's just say most of the RHS thread on BIS is all Greek to me because all they talk about are bullet calibers. :) I can't say any recommendation for a mod with armored SUV's I'd give you would mean too much. I see big cool looking truck. Everyone else sees tire pressure and moldings and model numbers and know the years they fought in the war. :(