I suspect the OP has his financials all figured out based on his post.
Since he is looking for insights, I suspect the basic financials he has got it together. It’s possible he may even have some type of health benefit being will be collecting a pension that I don’t know.
So this is my only thought in preparing. Much of it depends on where you live and your particular circumstances however, I know somebody around that 55 age group that will be retiring.
They have planned for it and I would stress anybody doing that keep in mind depending where you live.
You have to be prepared over a 10 year period to layout over $300,000 for health insurance. This is a low number for the northeast and possibly a realistic number for the southeast. But you need to keep in mind that is today’s cost in the year 2026. Certainly it will be higher by the time the OP retires.
The couple I know in the northeast currently pays $30,000 a year for two people. If in the unlikely event health insurance did not go up over that 10 year. It will cost them $300,000 but let’s assume health insurance keeps going up. You will be looking at $350,000 - $400,000 or more
Anyway, it’s a good number to keep in mind, in your calculations make sure to allow health insurance expenses because they’re very well may be one of your biggest expenses untill you reach age 65 should you choose to carry health insurance