Hillbilly is - quite literally - a gentleman and a scholar, and I'd strongly encourage you to take his advice, if you can afford it.
Sea Horse is certainly amongst the nicest, and most expensive, developments in the PP-Sosua-Cabarete corridor. Most of the properties are owned by folks who live elsewhere for large parts of the year, and either rent out their properties, or just let them sit.
I rented one about two years ago. The villa and surrounding grounds were simply gorgeous, if pricey. You might do better negotiating a resale than having one built.
Less expensive villas/condos are also available. I'm sure some of the folk on the site will be more than happy to point you to their developments of choice (and commission). :^)
Best of luck to you.