Not sure if you still want job suggestions. I also don't know if this is already possible but:
Slaver Run: The Slavers at the Den every couple of game days go out and hunt for slaves. You can sign up to go with them. While with them you capture the max amount of slaves you can catch, but then you go up to the head slave master and hand your slaves over to him. So that way you can keep catching slaves. The slave Caravan then travels from towns around the North. Could have some outposts that only show up when you join the caravan. Some safe houses so players who are out slaving can drop off their catch.
You get paid while with them. Just like other caravans other players can enter the encounter and fight those slaving.
Edit: Wiki says slave runs are possible but this suggestion is a different take on it.