Markam I understand refugee problem, there are just much less fishy ways to execute it. Player RP around the place is very nice. But making progress that other houses make for a century long periods of time in a decade is mary sue play, but house.
Yberg, you produce modular housing for billions of people, along with spaceports, hospitals, roads, means to produce its own energy, and basic good. Because shipping everything through space is likely not possible, and redicilously expensive and so on. Not like most of refugees can pay up. I understand if bretonia had peaceful decade where she could invest into something like this. But even then billions is super realistic.
I dont know why Bretonia is hosting all those refugees locally. Could use a part for colonization projects and force the others into the other houses. Its just expensive upkeep for the government that brings nothing. Internal refugees are never good for economy or social stability.
As for cambridge, well, then either New London and other houses or play a nice civil conflict between refugees and local elite. Could be more interesting.