It's actually feasible to live outside the USA without medical insurance. In the USA, medical fees are crazy expensive, especially without insurance. But this is not the case in other countries.

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.