That’s rough, but when a business is no longer economically viable it’s probably time to close up shop.
What if the economic change is transient? There are only two regular restaurants in town. The impact is larger than just the owner.
The town itself might very well not be viable anymore. I’ve seen this happen in my own neck of the woods. It’s sad, but the death of small towns like this is just a reality of the economic policy we’ve chosen to pursue here.