The thrust of this thread is all wrong. One should never concern himself with how much money one can make doing something. That's a recipe for hating life. One should focus on doing something that he loves to do. Whether it's the practice of law or shredding on a Gibson Les Paul, doing what you love will always be its own fortune.
If someone knows of a guaranteed and easy way to make 160k let me know I'm sure everyone on this board including myself would like to know.