I didn't go into a lot of detail, and would not share it here if I did.....if you are interested, ask her when you meet her.
But the impression I got was that the income might have been good, but the costs involved in staying in Europe long term were also very high.
Same as the girls who go to Singapore. Guys whine about them asking for SGD 300 in Singapore, but how much do you think it costs them for flights, hotels, taxis, eating in Singapore, etc........a LOT more than their normal living costs in Thailand!