Is 5.6 million a lot? Where are they located? There are 127 million "households" in the US. And 258 million adults. I know there are unmarried/non-partner adult

Is 5.6 million a lot? Where are they located? There are 127 million "households" in the US. And 258 million adults. I know there are unmarried/non-partner adults currently sharing living space who would prefer to acquire their own residence, so that 127 million number wants to go up. Seems like the issue is not enough housing in desirable places. And not enough desirable places, so the demand gets concentrated excessively into the small number of nice, convenient places. Build more trams and subway and regional rail lines. Upzone and pedestrian-orient more areas around transit. People want to live in places like this but they cannot because the few places that do exist like this have such high demand and prices are high.