2hip,
I agree with Willy, it depends on where you plan to live. In Asian culture 20 years age differences are common, but from an American immigration viewpoint a large age difference can cause problems. I think that as long as the age difference between you and her is 50% or less of her actual age you should not have any problems with immigration. If you are 60 and she is 40 then 60-40=20 50% of 40=20 Best Wishes, Robert
P.S. Did not mean to jack your thread!