little confused as to what you're asking. You'll have to be a CFI to teach in the US anyway, so you will be an "ordinary" cfi...it can be done as a living, plenty of people are doing it. Just find a place that you can get a good inflow of students to keep you occupied. Typically, a freelance CFI who has a good student flow can earn around 30-35k/year. If more interests you, continue getting your instructor ratings and apply to be an Designated FAA examiner. those guys, can make bank.