I suppose we are kind of that couple. We lived in a modestly sized townhouse in a "transitional" neighborhood (Columbia Heights) because we both determined that daily commuting for work was going to slowly, torturously drain the joie d' vivre out of our lives. We also wanted money for travel and a nanny.
We could've had a big house, a pool, nicer cars, and the like. But those things, we decided, were not essential for us at the time. We needed to be able to zip back and forth from our jobs (and grocery stores and parks and other liesure venues, preferrably on foot) in order to spend time with the family.
So I guess maybe we're not the couple you're looking for: because for us, TIME was the most precious resource.
In the end, we moved from DC to another city far away. The quality of life is much higher here because, again, we made choices that optimized our time together.