I figured Big Town was already "fleshed out" and was easy to "borrow" from, and without interfering with the main quest or the scripted sequences. But to stay away from unnecessary pitfalls sounds like a valid point. This means I need to build up my base and my NPC's with dialog options from scratch. I have no immediate plans on making this a long winded quest. I might change that later if I feel I can do it based on time and skill-level.
I was thinking I'd make a small base with reinforcements and a helipad. Reinforcements being my companions or a few selected NPC's dedicated to this. With one Vertibird as transport. Meaning when I call in reinforcements, or dismiss them, the vertibird is committed to that task and can't be used for anything else in that time period. Same if I used it for personal transportation. Perhaps introduce a small activity timer in one of the corners for show. If I'm able to figure out FOSE and how to use scripts properly enough. Either way I'm planning on stripping out the airstrikes and bombing runs from the Enclave Commander mod (pending the author gives me the thumbs up to modify it). I also want the squad to scavenge after the encounter, but I think this is already covered in the MMM or even FWE. Not sure if my squad will adhere to it though. It will require some testing.
I also want to introduce the need to repair the Vertibird if the need arise, or even build one from parts and scraps if it gets shot down. But that's for later.
One immediate question comes to mind though. The various containers and lockers that I use in my mod, how do I make them persistent enough to store stuff indefinitely. Is this dependent on the "no reset" flag from the encounter zone or do I need to flag the container/locker as "player owned"? Will NPC's loot them if they're neutral/player faction and will they reset/respawn items unless I set this flag?
But above all, can I achieve all this in GECK or do I need other 3rd party tools? I'm fairly confident using GECK for the most part. As for the scripts and the more advanced editing, I need some directions on where to learn it properly. I could perhaps reverse engineer what's already out there, but that would involve asking for permissions and/or endorsemants. Not easy as most modders seems to have moved on to NV or Skyrim these days.
So there you have it. It's the basic outline on what I have in mind. I'll take a closer look at the places you mentioned Octarina. For all I know they might just fit my plans
As previously stated, all comments are appreciated!