Lots of people are doing this / have done exactly this. My parents and many of their generational peers (boomers +/- 10 years) did the large house thing in the

Lots of people are doing this / have done exactly this. My parents and many of their generational peers (boomers +/- 10 years) did the large house thing in the 1960s-1980s in order to raise the kids, then sold their large house and moved to a smaller house or condo as the kids moved out in the 1990s-2000s.