Now, the market cannot solve a problem that is linked to human nature. Humans like living in dense areas rather than on the top of mountains, so space will be more and more expansive as density increase. Nothing unusual. Density also brings more jobs and more commerce so this is a cycle that goes with it.
This being said if you care nothing about living in a modern civilization it is perfectly possible to live far away from cities with very minimum expenses and a lot of land. Thats just not what people want.
Then there are things like medical expenses, debt, family members in need of support.