How are the cottages a symbolically appropriate setting for the story? (Think of their original use.)

The Cottages are an appropriate setting for the harvesting of the clones' organs as they have been converted from old farm-buildings. Back in the day, the farm would have been used for the exploitation of animals for meat and dairy products. And now, these converted farm buildings are the site of human clones being exploited for their organs. There is a disturbing parallel here, one that tells you everything about the treatment of human beings in this dystopian society. Humans, like farm animals before them, are regarded by society as having no intrinsic worth. They are little more than a social resource, something to be used, exploited, and controlled to fulfill certain ends. This makes the setting quite symbolically appropriate.