Why would you expect anyone would provide details. Accept the fact that most K-girls come over for short tours some who  do well return- sometimes under a different name . The residents take time off ,if for no other reason to preserve themselves and remain fresh   or  most likely to recover from stress and burnout that is a major aspect of their profession.

There is no shortage of new beautiful arrivals , each girl who departs to takes time off is replaced by fresh and exciting talent.

BTW why the alias for this , one cannot even privately answer if they wish.  

you would understand why.
1. Working in an illegal business
2. Living and working in a foreign country in which they are in fear of getting deported/arrested (whether or not they really at risk)
3. Having their family find out what they are doing
4. Servicing multiple customers every day, 12 hours a day, 5-6 days a week
5. Dealing with unpleasant customers or fear of ripoff/harm/std from customers
6. No social life.

What do looks have to do with lack of stress?
Some do make a lot of $, but does that make the job stress free?

Cost of living in la is higher than other places. La has a ton of competition.  100+ typically.   Where I'm from we get occasional visits from Thai working both LA and Phx, but can't get any of the 20-30 hot Korean girls to visit Phx even short term.  LA mongers have higher performance expectations than a lot of other cities.  Most cities don't care about cim p2p or fiv fia and rimming.   LA. Kgirls who want to make money better do it all and do it well, and have to be attractive.

LA is a great place for the stars who do it all.

read reviews like Rani's...all is well than some trogladyte low scores because he is impotent and wants serives not offered. These gals live and die by the scores. 8 out of 10 guys respect the covenant. 2 of the (at least 1 a day) for the provider create fear, disgust and STRESS.