Hi Alvaro,
If I were you, I would do my degree in the US, as it would have more weight -internationally - than one from Dom Rep.
I did my Business / International Management studies in Dom Rep , and then I came to London to pursue a Masters. In my case, having two degrees from two - very different - countries was very interesing. My degree in PUCMM was actually not that bad, in fact, when I came to Europe I noticed that our education system (private one) is not as bad as most people think..
BUT
If I were you, and in your situation, I wouldnt think twice about it - I would finish my degree in the US and if you really want to work in DR, you will have to find a very good job - with a very decent salary that allows you to have a car and decent living, otherwise, you will not like being in the Caribbean, walking around using their 'amazing' transport system and not having electricity at home ;-)
That is my suggestion. I also think you should speak with your teachers at school. They will for sure give you the best advise.
Hope this helps,
Paola.
London