You teach conversational English in order to get a visa, cheating your students of a proper and decent teacher and English education. You have severe issues with women, you view everything from a monetary stand point. You are on a teaching website asking for tips on price and services offered by Vietnamese prostitutes. You are a sex tourist, plain and simple. If you believe this means you have your life 'sorted out' you are more delusional than I originally thought. Get help.