Playing the devils advocate
OR
you may consider accumulating enough funds to enable self supporting your family for a period of time, say 12 months.
Make that application to your high paying employer for 12 months off without pay .. you know, so you can travel around Australia or something, then go chase your dream.
See how you go, see if it is really is what you want, see what you can make of it.
You then have the opportunity to see if the grass really is greener on the other side of the fence and if it is worth crossing back to the dark side, with the safety net of your high paying job and quality life style still within reach.
at mid 30, you are not that old, for anything .. at mid 40 you maybe ..