I went from 0-CFI in just over 11 months. No job, flying 3-5 times/week through Commercial (9 months). I did ground on bad weather days during PPL and home study for the rest. When I wasn’t at the airport I was usually at home studying the rest of the time. Flight training was basically a full time job over that time. You might could do it while working full time but that may cut into you developing a true understanding of what you’re learning.

Edit: As the above poster mentioned, enjoy the time building. It’s about the only time when you’re out “just flying”.