This story differentiates from Roll Tide's given BD's willingness to open up, accept criticisms & comments, and he is not self defensive as RT was.
BD,
I like reading your TR's. They are entertaining. But this thread is warped and your strategy really needs rethinking. Damn, where to begin?
This seems more like a business transaction than a love story. More like you need to check off a time deadline or something on a chore list. You said you are both not in love with each other yet, and I read in another thread, the sex wasn't off the charts

? WTF, I would totally get it if there was attraction, romance, phenomenal sex, falling(even though hastily) head over heals, etc. There is a sense of "so so" & "just settling" here on both your parts. I wonder why? This is Costa Rica, you've got game and there are an abundance of chicas. At least go through this adventure with someone that you are hot & heavy for and is equally wild about you. And at least with a "Romeo" story, one can understand the rationale for the irrationality. You are already certain she will leave you in 10 years? What does that say about "tu pareja" as well as her character? Here you are "saving her," being a father to her Ch*ld, financial provider, and you are certain she will leave? At least in a "love story," there is the hope and promise of a good woman; he and her caring for one another and having a lasting relationship. And for sure, that Romeo would get flamed and warned here as well.
As for "saving her," it would start by forgetting how/where you met her, what she did for a living then, and don't refer to her as a "ho." It seems to me like you won't forget it nor let her forget it. I can see this being a recurring theme and a go-to jab in future fights. If she was a working girl, and now stopped for you, you owe it to her to drop her past and never rub it in her face and remind her you "saved her." Just view her like a "normal" woman b/c she is a woman, that's it. Also you want to view her as worthy of being a Mom to your daughter at home and you need your daughter to see you giving your new wife that respect as your marriage will be an influence in her life that will carry her into adulthood. And probably be a blueprint in her married life. As for saving her, that is the wrong mindset, b/c as much as we love our country, the American Dream isn't always exportable, or importable, in your case. Most Ticos/Ticas are more content with the little they have there than most North Americans with much more here.
All that being said, I really wonder why you just don't attempt this arrangement with the abundance of available non green card holding Latinas in South Florida? I would think there are many that would agree to such without all the hassle for you and potential collateral damage. Hell, they are already here and probably know the immigration process better than you. And since they are already here(you didn't uproot them) if the relationship doesn't work, then it really is a "no harm no foul" situation.
And un mas cosa, if you really want to do this to have a trophy wife, a partner, a mate, a woman in your house to influence your daughter, get back at the ex(I get it), and this is something you really really are hell bent on doing, than by all means get out of Costa Rica and head down to Colombia and find a beauty down there that is the woman of your dreams and one you are crazy head over heals for. IMO, your chances for success are much much better with a Colombian woman; they would make a better wife, more apt to be loyal throughout, and the Immigration process is probably easier.
Mi Dos Centavos.......many will be following your saga.