Am sure you would like Jardin if you don't mind a little car ride to and from the beach. You definitely feel that you are staying in France in that area and good pharmacy and grocery nearby. Nice little restaurant just down the hill, walking distance. Should be great in July/August!
What do you expect the difference in cost between Jardin and renting a small villa off season will be? I would think comparable although maybe more for a villa with private pool. If you like the possibility of socializing with other naturists, go Jardin. No kids there for sure! Wonderful hosts too!