I started my PPL when I was 26 and went the "slow" route. I worked full time and was concurrently earning a BBA. Took me three years to get to CFI/II. Been instructing for 1.5 years and plan on another six months. I passed 1000/100 about three months ago. I'm 30 now and anticipate no worries when the resume machine gets spooled up again.