I would say Peru and Argentina will be easier and cheaper, too. Egypt, in case you didn't notice, is currently in turmoil. Also, I would be reluctant to take a woman there even if it was stable.
You can take her to Thailand - easy to get in I assume, very cheap, and a really nice and exotic place to visit.
And yes, the more visas she has acquired, the less scrutiny she will be receiving. She still will have to show money on her account (you can help her with that if you trust her enough), get a letter from somebody stating that she is employed there. If she can show that she is a bona fide traveler, that she always returns back to Colombia, it will be major, huge point in her favor, but not a guarantee.