You can also plunder and raze villages for a ton of loot provided you have bad enough relations with the faction, but this has a slightly higher risk of provoking a peasant uprising and the village will hate you forever and ever so don’t do this if you ever plan on recruiting from there. Showing up with a band of troops and demanding supplies is a low-risk high-reward move that can potentially net you very valuable goods and only pisses of the village and it’s immediate landlord. For serious money the best way is to get a band of troops together and then start plundering villages.