The net after-tax salary in France is €2,450, and in Germany it's €2,750, compared to the €850/mo this kid spends.

I can't see how you could survive long-term on around 1/3 of a nation's average salary, even in the most rural of villages with hardly any amenities, rent alone is going to take up the majority of your budget.

You could probably get by reasonably well in Greece, and could live very well in the Balkans.