FIRE is retiring early and cashing out. Often achievable for a lot of STEM types, esp. those with access to FAANG tier salaries.
Hit the $1.4 million mark, which has a safe draw of like 35-40k a year without lowering principle, and then chill.
Chill doesn't imply not working, just working on your terms, and a part-time job as a mechanic might be unsustainable normally, but with a FIRE background you could make it work.
https://en.wikipedia.org/wiki/FIRE_movement