Great advice, I'll try to whip something up.
So the hold (called The Machine) is located at the Coca Cola bottling plant in Barrie, Ontario. There's roughly 150 civilians, 20-strong survivors of original security detail, 25-strong Chopper's gang. Main exports are clean water and protection. Main imports are food, labor and machine parts.
Surplus is gained from trade and tribute, so that should be about 2-barter.
Wants are hunger, dissent ("hey, remember how good it was when Dustwich ruled?"), malfunction, and reprisals.
Here's what I came up with. Are these moves too harsh? Is the "gain surplus" option redundant, given that a Chopper with +3Hard and +1 to fucking thieves isn't likely to need barter?
When you tend to your holding for some time, roll+Hard. On 10+, choose 2. On 7-9, choose 1. On a miss, your holding, your gang or both are in want.
*The holding is not in any of its wants.
*The gang is wealthy and content.
*You gain the holding's surplus and willing cooperation.
When you're away from your holding for a length of time, leaving someone else in charge, roll+Hard like you would when tending to your holding, only on 10+, you choose one and the MC chooses one.
When your gang is wealthy, you take +1 ongoing to the move Fucking Thieves.