Arma 3 AI is either too easy or aimbot spinners. although this does sounds like quite a good idea I have a feeling the mission file space this would take up is way too much.
trucks dont just despawn, make sure to put something in/take something out of the inventory every 10 minutes to prevent them from despawning. Make sure you're always recording too.
jail time isnt counted by total bounty amount I think, always used to be based off of whatt type of charges you had, pretty sure manslaughter used to be like 8 minutes per. I think its unchanged but could be wrong