yogsloth: I would estimate the dusk post/PM-writing investment for me was about three hours per Night. Of course, I don't know if you know this, but I like to write a bit of flavor. Most mods can probably adjust that downward a bit.
Actual in-game modding doesn't take much time, especially if you use a good tool for vote counting (I always share mine in case other mods want to take inspiration from it).
From what I've seen, when players unvote before voting someone new, it's a bit easier to track down (or it would be easier for myself). One question though - when the night actions happen, is there a general rule of in which order to treat these actions, or is it completely up to the moderator?
It's something to ponders, because if actions are time sensitive (first come - first serve), then there's some tension put on mafia players. For if they wish to succeed, they want to have a discussion and that takes time. But it doesn't take much time for neutral or some Town roles to determine their choice. And that can greatly influence the game.
For example, player A is mafia; player B is serial killer; player C is town. Night starts, actions are time sensitive. SK has made his choice during Day time to kill player A. So he is first to contact moderator "I did it again. I sent another soul to the gardens of Eden. I killed player A". In the meantime mafia decides to kill player C. Player A makes the kill. He informs moderator of the action about 12 hours after the Night started.
In conclusion... If actions are time sensitive, SK has killed mafia killer and townie lives, mafia is one player short. If actions are not time sensitive... What then? Up to my judgement?