I am working through this right now with a house that I recently bought. No way around the restrictions, but we did find one loophole. Two related families (eg two families in which the respective fathers are brothers) can live in the same house, at least under the way the restrictions are written where I live. We are able to house two refugee families in the same house legally as a result, but it's a shame that it is not easier to do, and possible with two unrelated families.