I don't know Trinie's complete situation, but my take is that if moving abroad is something that she truly wants to do - what is the harm. She seems to be in a situation where she has less responsibility or duty.
She doesn't have a spouse, children to take care of, elderly parents to watch over, or a stable relationship. Further, at this stage in her life - what does she have to lose? She is not exactly ending a lucrative career or great relationship to follow a dream.
As she proceeds in life, she will have a relationship, a family, and a career, all of which will make it harder to just go and live abroad for months or years at a time. And the worst case scenario is that life abroad isn't as glamorous or as exciting and she just packs up her bag and go back home to find a job.
Assuming that she has the financial ability to finance the trip abroad at this time - I really don't see the harm in taking trying out the dream.
Life abroad isn't really so hard that a person cannot survive it. You do need to take some common sense precautions and preferably choose a country where you have some support system (friends, aunts, uncles, other distant relatives).
I, honestly, feel that Trinie is trying to escape her current situation rather than a person who truly wants to start a career abroad. But if I were her, at the end of the day - I rather be saying to myself, "I really screwed up that decision," rather than, "I wish I had done that when I was 30."
Further, she is not exactly sacrificing anything, either relationship or career wise, to go abroad.