I'm about to turn 30. I started training for my PPL when I was 25. At the time I was working at a low-wage job and living with my parents. Halfway through I got frustrated with the low-wage job and quit. Since I was living at home, I had saved enough money to finish my PPL, so I continued my flight training while I was looking for a new job. A new job didn't come along, and I needed something that paid enough to support my new "habit", so I went back to school to get my A&P. I barely managed to afford to finish my PPL in 2007 at age 26, with full knowledge that I would have to quit flying. So I did, and my Private Pilot checkride was the last time I flew as pilot-in-command.
I continued with school and got an entry-level mechanic job. Unfortunately, it only lasted four months. Then along came the long-distance girlfriend which quickly turned to a serious relationship. So I finished school while dating her. We married right after I finished school and moved in with her parents, but I had to go back to school to finish up FAA requirements and test for my A&P. I got my A&P in 2009 and started job hunting again in the middle of the worst economic crisis since the Great Depression. It took a year to land a job, but I got lucky and make good money. We spent eight months in an apartment, then bought our first house.
Now, four years after I got my ticket, I'd like to continue. Buying a production airplane isn't even an option. It's too expensive. I'm torn between going out and renting again, or building my own airplane. Renting means I get to fly now, while building means I get an awesome airplane, but mostly likely won't fly much at all while I'm building. If it takes 5 years to build my airplane, then I'll be 35 before I get to actually spend much time in the cockpit.
So, if you've read this far, I'm glad I got my license in my 20s, but I totally understand why others choose to wait or are forced to wait until much later. It's just too dang expensive, and other things end up taking priority and keep pushing those dreams to the back burner. It can be depressing, but just don't give up hope and keep inching toward your goals.