I have a science fiction story on my Web site that posits space ships in which the basic hull is just a skeleton for hundreds of thousands of self reproducing, non-organic beings. Inside the hull, organic beings in an organic environment, on the outside of the hull, inorganic beings in an interplanetary or interstellar environment.

There are a few magic wands in the story, especially propulsion, but most of the technology is only a few steps above current practice.

Conrad