With regard to the scalability question:
It would probably be farsighted to try to fit one of these power units into a containerized cargo unit right at the beginning of the design phase. They might need outriggers to contain shielding water (mainly for neutrons.) I’ve seen many references in the forums to these units being “about the size of semi trailers”. Well, maybe we should endevor to make them exactly the size of those modular trailers. They would sure be easy to transport that way.