Geographic arbitrage for medical care is a great option.
Also, and this may be a bit unseemly but, go get the bronze/silver ACA plan and if you do have some sort of catastrophic medical bill… stiff/slow-roll the hospital. The ER has to take you, they frequently bill you after the fact with insurance for many in-patient items. Most hospitals will accept a marginal minimal monthly payment you can really stretch medical debt out for a LONG time. Plus it doesn't accrue interest.
Worst they can do is ruin your credit score (who cares when you are a debt free millionaire) and I guess sue you (if all your assets are in retirement accounts and/or your primary residence, and you have no W-2 income... they'll be suing a rock).