Like others have said, if you have to ask, it's not for you.
I did an instructor rating (back in 1990, with a job promised at the end, that did not happen!) and found everywhere I went wanted either G2 or higher and was told many times by CFI's that I called in to see, that most of his clientelle were older gents who didnt appreciate handing out hard earned cash to be taught to fly by someone who could be their son! I was told many times, to go get 1000hrs plus, then take up instructing if I was serious.
Now, 22yrs later with over 1000hrs, Id like to do some instructing, but the cost of renewing, combined with the low pay and the fact that Ive got zero instructional flight time (have the 100hrs supervised ab-intio to do) and I'd probably have to move to get full time work, Im thinking Im better off staying in my current "feet on the ground" job (which pays about what a REX captain might get) with the occasional flying skydivers gig and flying for fun.
Lancair