SA,
If you can earn actual money through another job, then continue doing that at the same time you become an instructor. You may well need that security of income. And you might get the odd student based solely on the fact that you've got a few grey hairs, and no excess teenage acne problem
But go for the flying mate. You might kick yourself later if it doesn't work out exactly as planned, but it won't be as hard as the kicking you'll be giving yourself every day for the rest of your life if you continually wonder "could I have done it?"
You'll never know unless you give it a go.