Jhkim, show me the tutor who makes money teaching languages without any qualifications, experience (sometimes more valuable than a paper diploma anyway...) and has NO idea what type of text to use or how to teach... That's what the OP is proposing.
Good luck finding anyone who is prepared to pay you 40 bucks an hour to talk to them, just because you are a foreigner.
Here's a thought:
I have a bank account with a bit of money in it. I'd like to put more in there. Since I have used money before and I know the difference between yen, pounds and dollars, maybe I could become a currency analyst... Surely people would pay money to hear what I have to say. Trouble is, I don't know what to do. Any currency analysts that could tell me how to do their job?