I have never stayed there, but why do you not take a look here.
hxxp://caribbeandreamsdr.com/
The BlueFish 3 bedroom unit would do you, and it is about exactly half way between Sosua and Cabarete. Talk to Peggy, for she is whom I have dealt with in the past, and you can generally negotiate a better deal than the prices posted, I would and have, anyway. I have no affiliation with any of this, just have stayed there 2 times, big pool, on the ocean, lots of parking, easy to catch a ride at the road (highway) though it is a 10-15 minute walk.
