For example: Korean medical fees are controlled by the government, to the point some doctors may struggle to make a living. And Korea offers pretty high quality healthcare.
I thought I broke a rib so I got two x-rays. This only cost $15 including consultation with the doctor. Without insurance.
Later when I got insurance, I had 5 x-rays of my knee taken. Only cost $5. The non-insurance rate would have been about $20. (Korean public health insurance generally covers 70% of covered fees.)
Another example: I can get a 6-month supply of generic Accutane for about $50 (not covered by Korean health insurance). This would likely cost thousands of dollars in the US.
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Finally, if you plan to be abroad for only about a year, traveler's health insurance for non-US countries is usually very reasonably priced.
Several companies offer traveler/nomad and expat insurance policies that give global coverage. I used CIGNA, I also know about BUPA. You can find others. Premiums depend on your age, health, and where you plan to live/visit. Generally expat policies don't apply to US medical care, or have restrictions on care received in the US.
Some places offer health care at such low cost that you can essentially self-insure by saving money and paying out of pocket.
Most remote friendly tech jobs I've seen offer a 90k euro base, at which point you live like royalty in most cities.
But usually you need to be able to show immigration that you have enough money to support yourself for the duration of the trip or visit.
The best would be to get a fulltime job in a European country for a few years and then get a permanent residency, resign your job and scratch your butt all day and still enjoy more or less free healthcare for life =)
BTW breaking ribs is something that might not get diagnosed right away 100% of the time. Maybe plan to not break ribs.