My personal plan is to retire early and use my wife's insurance until I turn 65. This requires her to keep working, so this plan has a high probability of failure.
I had a co-worker who retired at 58 or so, maybe he was 57. No income, living off savings, so his health insurance is similarly subsidized.
Last tip - you can withdraw from a 401k or 403b before 59 1/2 without penalty if you do it right. You have to be at least 55. See this -
https://www.experian.com/blogs/ask-experian/what-is-the-rule-of-55/
Last last tip. Get a job you hippie.