I found this place in portugal priai d'el rey
and found quite a few of the townhouses/apartments on holiday rentals site for about £800 a week peak season, these have shared pool. The villas are about £1200, with own pool. Site has tennis, football, golf, spa, childrens club etc etc.
The tripadvisor review of the hotel is really good and you can use all the facilities when staying in the houses!
tripadvisor
If you can get cheapie flights it should work out quite reasonably for a two week break.
I think DH and I are going to book. Will go for townhouse I think, then DCs can make friends round the communal swimming pool!