Most books have proxy owners on paper in the CR government archives who are not US citizens. Prooving that you actually owed a sportsbook by the DJ is not easy unless you don't try to hide the fact. Esssentially owners are no different than employees (US). Taxes are another matter and can be taken care of with a good tax attorney in the US. To answer your question in a word NO.
Wsex is the reason I said if you don't try to hide the fact. Not to mention it is in Antigua. To be honest I cannot truthfully answer that question with any confidence.
You bough a sports forum, with offshore advertisers, and now you are going to costa rica to open a book, how bout throwing a brother a bone here, since your now loaded.....
I strongly advise against doing this and besides, with all the dough you make as HEAD MODERATOR for this site, why on earth would you want to do this? :WTF: