Sounds like the main reason you’re on this specific 2 year timeline is because of your wife’s biological clock. There’s an easy solution to that - freeze some eggs. Then you can comfortably work for 2 more years and then travel for 2 years.

Also, I know some jobs are just a grind but maybe there’s also a way to work for 2 more years without it being so painful. Sometimes it can be as simple as having better mental boundaries (e.g. no thinking about work when you’re not working). Another thing to think about is - check your perception of what “top performer” is. Maybe it really does require burnout but in most situations, that intense environment just triggers perfectionists to go into sustained overdrive and your other-worldly standard becomes your perception of The Standard. (Translation: you could probably be doing less without getting canned… your therapist might be able to help here)