As I mention in my comment there is good and bad for both. There are also very messy divorces in the USA. Also, if a Filipina comes on a K-1 visa and get a divorce. only will she be able to remarry in the Philippines is if the foreign spouse asks for the divorce. even then it might be hard. The marriage will probably have to be a null
Art. 26. All marriages solemnized outside the Philippines, in accordance with the laws in force in the country where they were solemnized, and valid there as such, shall also be valid in this country, except those prohibited under Articles 35 (1), (4), (5) and (6), 3637 and 38. (17a)
Where a marriage between a Filipino citizen and a foreigner is validly celebrated and a divorce is thereafter validly obtained abroad by the alien spouse capacitating him or her to remarry, the Filipino spouse shall have capacity to remarry under Philippine law. (As amended by Executive Order 227)
Las Vegas is probably the only place where you can get a marriage license same day. while the wait is not as long as the Philippines. a lot of states there is a 2- or 3-day waiting period
In the Philippines after you get the Marriage license you can get marry anywhere in the Philippines. IN US you have to get married in the state or county that issue the marriage license
Our Marriage was easy there. We actually got married at my wife parents' house by the mayor
Again, there was not that many hoops to jump to. Since the op mention that him and his wife are older, she will probably not even have to do seminar. I am pretty sure she will not need parent consent or advice