Well no body else wanted to do it so I'll will be the first to give advice
Do what those other guys said.
Udon emplyment yes there I some, people do infact make it on 4 k here how they do it I have no idea but it can be done and raise kids.
That is if she has a place to live, that doesn't cost her anything.
She wasn't working in Bangkok if she didn't have to.
Like they said go slow, really doesn't sound like you are if she has only been in Pattaya few days you couldn't have known her long.
Give her two week there and she will be learning survival quickly. The 20k isn't a lot of money, maybe she sold her motorcycle. I don't know.
You need to get here back to her roots and then you can learn what you really are dealing with. It could be that she has a extended family beyond her children that she is supporting, maybe even a husband.
If you decide to embark on this adventure be prepared to get the wallet out, goes with the territory. If she could make it here, she would be here.
The life for a bar girl in Pattaya isn't hardly paradise, it's just about money.
See nothing to add that the other guys hadn't already said.
Good Luck