You can pretty reliably half your mortgage in most parts of the developed world by accepting an extra half hour on your commute - if you commute. This trend is likely to only intensify as incomes rise, the Linder Theorem [1] becomes stronger, and people become less willing to accept even a 5 minute addition to their commute in exchange for saving tens of thousands of dollars over the course of their life. (Which makes sense - 5 minutes over a 40 year career for a $100/hr salaried professional comes at a cost somewhere north of $150,000).
[1]: https://www.opus1journal.org/articles/article.asp?docID=145
