Call me crazy, but it would be nice to build a location that allows the addition of 'friends', but not be a faction group base. Cost a little more for the individual to construct, either materials/caps or both. The individual could add 'friends' to the location, but not members. No computer, work bench, etc. Just a safe location to drop/pick-up gear.
This could be expanded, to allow individuals to create work benchs in their 'house', but the material cost would need to be high, to make it less likely that everyone would do this.
Just saying, call me crazy, but I would like it. I also really like the idea of having a more permanent structure.
Also, perhaps make the tent build on a empty cave screen allow the brahmin hides to act like a door to the cave. Just make the cave small, like a dug out, with one container.