It helps you tremendously that your boyfriend is from Mayaguez. You will be able to navigate things much more quickly and efficiently when you get there. It's ALWAYS helpful to have a Boriqua with you whenever you deal with anyone for anything. When was the last time either of you were in Puerto Rico? The reason I ask is that it has gone through a lot of changes in the last 10 years or so and it's nothing like the Puerto Rico I knew years ago. My wife is also from Mayaguez. I loved it there for the most part. She's from Barrio Columbia, which Barrio is your boyfriend from?
Land has become cheaper than it used to be these days. I would expect that the mass exodus of natives leaving the island might have something to do with it. That is something you might want to take a closer look at.
If you can manage to get reasonably reliable internet service I would suggest home schooling. I live in central Florida and PR school teachers are coming here in droves looking for work. You won't find too many people that speak highly of the public school system in PR here on the forum. We home schooled our daughter for the entire third grade in PR and it worked out wonderfully. Plus she ended up with a quality education from it.