Similar to size / facilities of small Les Castels campsite, but cheaper?

[Mandy21]

Stayed in a chalet on a Les Castels site 3 years ago, but now have an extra child and the cheapest chalet / mobile home to accommodate a family of 5 is about 900 euros for a week in the school summer holidays.

Is there such a thing as a comparable to Les Castels but cheaper? Looking for a relatively small site, not too many Brits, quiet, but with great child-friendly facilities (stayed at Chateau Les Eaux previously - had an outdoor pool, a fab indoor pool complex with slides etc, playground, fishing etc but it only had 200 or so pitches/rentals so it felt quite small, never got busy and wasn't a "brits abroad" type place - lovely grounds etc). We want the same type of place, a little bit further south, but not too expensive.

The other option is to camp on a Les Castels site but I'd much prefer to have a chalet / mobile home.

Can anyone help? Many thanks in advance!