Sensei,
There are many places like that. You can find one like that in any tourist area (Samana, Puerto Plata, Bavaro, Boca Chica, Miches, Ect...). The principle in tourist regions is that if it's not by the sea, the land is practically worthless, so look just outside those tourist regions (oh and hey all have airports).
If you like living in metropolitan areas, try just outside the City of Santo Domingo, or Santiago.
My personal prefence to live in this country is way up in the mountains of Bonao, in the town of Piedra Blanca (White Rock Town). It is 40 minutes away from the center of the Santo Domingo National District. It is never too hot nor too cold in those mountains, and there are 10 rivers that cross the area. My Land has a river that passes at the beginning of my property, and many MANY horse trails. It is a cowboy town, the Rodeo Being the main attraction. A interesting paradise for some, the only foreigners are a group of Doctors and Nurses that work at a Free Clinic set up by some American Non-Profit Institution. For 3 and two dollars per square meter you can buy some serious amount of land.
Where ever you buy, make sure your lawyer guarantees you will get your land title on your name, and make a deal: You pay the remaining half once you have your land title and you have verified it's real. (You can do this by going to the the nearest Land Court, with your title number they look it up in the computer, and what comes out in the computer must be the same as your title)
The New Dominican Immigration Regulations requires for EVERYONE that wants to get a Residency Permit in Dominican Republic to get a Residence Visa. This is for EVERY FOREIGNER, EVEN if you do not require a visa to enter Dominican Republic. From now on YOU ARE NOT be able to apply for residency if you are in Dominican Republic with a Tourist Card. So if you want to live here, apply for a Residency Visa at your Nearest Dominican Consulate. If you are already here, then you must go back to your country and get the Residence Visa at the Dominican Consulate or embassy. Some lawyers might not know what I've just explained, but iT's because that part of the New Immigration Regulation has only come into execution last friday.
At the momment, a group of lawyers (including myself), are negotiating with the Dominican Foreign Relations Ministry in order o find a way to get our clients Residency Visa from within Dominican Republic, and I'm optimistic some solution will be reached, but in the meantime, the law is the law. So apply for your Residence Visa, or you wont be able to get your residency permit, and if you over stay your tourist card period, then this gets a bit complicated, because if you leave DR, you will need a special permit to come back.