Paris is expensive, but the rest of the country is pretty cheap. Nantes isn't even in the "second biggest" city league. So you can expect something like 25% to

Paris is expensive, but the rest of the country is pretty cheap. Nantes isn't even in the "second biggest" city league. So you can expect something like 25% to 50% discount on the cost of pretty much everything (especially rent, but not just that).