At least 1,000 b a day for a basic life.
But, there are many more potential expenses. And do you ever travel, play golf or other sports? Insurance and other normal life expenses? Motorbikes or cars?
50 k a month could work.
A few years back I met 2 men and a lady in Pattaya at my hotel who said they were from Australia. They claimed they worked for "an agency" and were investigating men having sex with underage girls. They seemed legit, not sure who or what agency it was.
Yes. The only people I know who pay taxes are government workers and those working for major corporations.
They are basically forced the pay. The rest, I doubt many do.