TRAVEL TO CAP D AGDE 2015
Only you know what style of travelling you are most comfortable with but you will have options in every price range. You can self-cater, stay in a hotel or tent. I could do it for about half of your budget but I'm not sure what your needs/expectations are.
If you are just starting to do some of your research, this site seems to have a pretty good collection of information to get you started: https://www.capdagdefrance.co.uk/
The campground has tent pitches as well as cabins and trailers for rent so if that interests you: https://www.centrenaturiste-oltra.fr/
I think there are five or six hotels within the naturist quarter and I don't know them all but this will get you started:
https://www.natureva-spa.com/
https://www.oz-inn-hotel.com/
https://www.hoteleve.com/
You will find some apartment rentals here that can be taken by the week:
https://www.resid.com/