In addition to Machkas hospitalization that was cited above, there were a few references above to medical repatriation or evacuation as potential costs you might incur.

In post number 3 above, I cited the travel insurance I bought a year ago for almost a month of cycling in Iceland, the policy cost me $49 USD. I just checked that policy, it listed $15,000 emergency evacuation, $15,000 repatriation, $5,000 medical expense. These days, $5,000 medical expense is not much coverage, but it is a lot better than zero.

That policy was offered when I bought my plane ticket by the travel agent. They had no clue that I was going to be cycle touring, so maybe that is why it only cost me $49 USD. I suspect most people buying that insurance were more interested in trip cancelation coverage than anything else.

I am not sure what travel insurance from the Insurance Company that is listed on HI website costs, I suspect more than $49 USD. But that is another possible source to check for prices. I cite HI because I often stay in hostels when touring, thus I was aware of them. I am sure there are other sources for travel insurance to compare costs too.
https://www.hihostels.com/pages/travel-insurance

Five years ago I had a more expensive policy with a company called Travelex Insurance. But I will probably look for cheaper policies in the future. I only list them here as one other possibility you can check if you are shopping around.