Obviously, I do not work in the housing construction market, but I can say that the particular challenge of this situation is to offer housing with more bedrooms, that is, more than what the market is used to providing to the general population.
The market is often based on the needs of a typical family with two or three children, whereas, when dealing with or building with an indigenous clientele in mind, more housing with more bedrooms than usual and slightly larger living spaces must be provided.
So builders must consider an average household size that is slightly larger than what one would normally expect for a non-indigenous household.