Camping site in Vincennes (Zoo of paris) :-))) = not expansive: 80 fr par
but a lot of people from Nederlands...
Seriously I don't know the good and not expansive hotel in Paris.
I leave in the great suburbs.
But WARNING to french "arnaque" (my dictionnary ignore this word !, sorry).
= an example when you take a parisian taxi from Roissy to Paris , observe
which tariff the taxi-driver choice for his counter. It's possible that will
be the night-tariff (more expansive of course)... It's prohibithed !