I agree 100% with everything Windeguy has said. He's knowledgeable and obviously proficient in math. However, consider this perspective:
1. the pesos has only gone from 37 to 41 in the last 4 years.
2. for every US $100,000 dollars you have, you receive US $11,000 in interest paid yearly in pesos.
3. the interest is compounded monthly if you have it in the right bank. this can add up nicely.
4. you pay 10% of your interest (not your principal) yearly. that's only US $1100 a year on $100,000--leaving you with US $9,900 a year in interest--slightly more if its been compounded monthly.
At the end of the day, the most important thing to consider is if you are planning to live in the DR for a very long time and use the money in the DR. If this is the case--and you don't plan on converting it back to US dollars, then yes, this is a viable option, and i have been surviving this way in the DR for around 10 years now. my father survived this way before me. i come from a long line of sloth like, lazy losers who do not like to work hard.
If, however, you do not think you will be in the DR for a long time, then i would not recommend this. in fact, i would strongly discourage it. It would be way too risky.
Remember, there are risks--one being the devaluation of the Dominican peso; the other being the country.
However, if you find a bank that is compounding the interest monthly--and you must be careful here, because there are flim-flam banks that promise high interest rates and everything else--i would avoid these banks like the plague and do your homework. I have no bank recommendations, so please do your own homework. Many of my friends here live off interest, as do my family. But, most of us plan on being here for the rest of our lives--or close to it--because we have a Dominican connection to the island.
Hope this helps.
Frank
Frank