TAS
It's that bit in your post that says, "show others the joy of flying" that tells me you should go for it. There's been plenty of people come to this forum and ask is it good for me, how much money/hours etc but that "joy of flying" is what does it for me.
On the other hand I do live with Mummy and Daddy, no social life to speak of and my best month in a year and a half so far is $650, half of which went on petrol. Depends on your priorities. "Do not underestimate how badly paid instructing is" as eyeinthesky said. But also do not underestimate the value to students of an instructor who loves flying!
Enjoy the journey
c6