I dont agree, the Netherlands is not expensive compared to DR, at least not in the capital, and with 3 children. I spend almost twice as much in the supermarket, housing is more expensive (admittedly I have a bigger house for less money here, but no possibility to deduct interest paid from my income. In the Netherlands I paid about 400 euros a month for a 236,000 euro mortgage, here I am paying almost 700 euros for 205,000.
Good medical health is more expensive (up to the standard of the Netherlands). Education is way more expensive. Fuel is more expensive (not per liter, but it is per km).
I was able in Holland to reduce my fixed spending to 2500 euros per month (with 2 children). Here it's more like USD5,000 and being careful to not overspend (in the Netherlands I'd go to AH and buy whatever I liked, the brands I liked, here we shop making choices what we will buy).
We came back to DR with the mind set: earning a lot of money is nice but we can do with less and have the immaterial benefits of the DR. At the end I do regret that decision. I would suggest to anyone to come here keeping in mind that he or she would be able to make enough money to live comfortable. However, I think you can make a good living here in your area. I agree with donP that many dominicans are thinking practically but there is definitely a growing segment that DOES want to invest in 'developed world' stuff. It might even be a status symbol.