Good work
indeed, the first thing that came to my mind seeing it was modular space habitat (without jump drive and jump fuel).
As a bulker, the small modular "containers" would defeat the purpose behind bulk carryng ,if we understand its economic to be like the economic of a ship, rather than the economic a train where small wagons must be used to carry grain or ore.
As a module/container carrier, I am not sure I understand the way you optimize the modules handling arrangment. As a space habitat with few modules changed over a year, "cargo handling" is much much less an issue than comfort and access convenience.
As a Colony ship, the practicality to have the passengers organize their home before departure, hook it and live in it for the duration of the travel with final delivery on the new world is great. Some public services (clinic, townhouse etc) would be carried along.
very neat
have fun
Selandia