Some people now use companies, but the use of KRA PIN in nearly every transaction will soon net everyone to pay some tax. Shida ya this method is money in the bank/transaction volume do not necessarily mean income.
Thats peanuts esp if you have family there. Even alone is still a long shot since the living cost is high. If you lease a House its 1000-1500$ expenses of 3000 if you have a family you spend easily 8000$