It's the new gov't speak. $75k per year income is "rich", a 1/6 acre lot is "large", and a 2,000 sqft house is a "mansion".
Notice that they use the term “acre” to conjure up some idea of a huge lot, rather than lot dimensions, which anyone with the slightest concept of land and real estate, would try to think in terms of.
I guess 1/6 acre is a lot in a third world country, which the Left feels that everyone should reference to. Perhaps Europe. The Soviet Apartments are what they really want everyone else to live like, while government officials have all the huge lots and domiciles.