The problem with stronghold is, sadly, that it might not be possible. The problem is that eventually it starts lagging like a bitch. For some reason the dynamically spawned objects seem to perform worse than those placed with a map editor. Another problem is that warband can't really remove scene props - once spawned, they can be hidden, but never deleted, thus hurting the framerate even more. Maybe some kind of limit would help, like, 50 objects per team max, but I never got around to testing that.
The other problem is that the gameplay is so raw, without having a dozen admins per game, I foresee lots of grieving.
Not saying it's dead, just that it needs serious rethinking.