Hello Poison, Will you be including the source of the silk in the drawn region as well? A Mulberry tree orchard with silkworms, or given the limestone karst and the way it can have caves pretty easily you could even go a more fantasy-based route and have spider-caves allowing a source of spider silk as well as, or instead of, the silkworms. To produce enough silk you'd need some larger than normal web-spinners, so there are other opportunities for commerce there as well. The spiders could be milked of their venom to allow harvesting the silk to be done more safely, then the poison could be sold on to the local Thieves/Assassins guild. If your spider eugenics program takes off you could get some which might take to training as mounts for small folk (be they kids or halflings or whatever real or fantasy race you have handy). I just thought I'd add some twists to the original concept, it's the way my brain works. Enjoy! Best wishes, niekell.