I put this same thing in my comment
they could have
thralls that are miners, lumber jacks, hunters and then out side of base could create work camps that generate goods based on skill level up the thralls work in the camps. camps have radius and access to certain resources based on resources around them…
the bearers who carry stuff be used for transporting goods between bases and between work camps and your home. could be increased with a taskmaster and more thralls working at the sites and you need guards for the site so forth.