$70K for ATPL/CPL/IR don't think so - would say at least $100K , maybe $85K if you really want to scrimp.
Training for Jetstar Cadetship 1.5 years , lucky to complete all of above in much less I would think
Wages first couple of years for Jetstar cadets , most are grossing $85K and over , just take the basic and add 25% pretty conservative really.
Yes some people reach an airline after 4 years GA, great for them , the figure would be less than 5% , probably more likely 2% of GA entrants to airlines.
Really just the tag line from a flying school when you ask about career prospects "Worst case mate , five years to a Jet Job" .
Most joining first airline Jet/FO , very few under late twenties, or early thirties really , typically 3000 plus hours to be competitive, normally will take ten years in GA/Regional.
Think of it this way , when you transition to your Turboprop command the Cadet will be transitioning to an Airbus command, he is five years in Jetstar, you are five in GA
You join the airline four five years later, the cadet is almost looking at Widebody command, and is likely at least 1 million ahead of you in career earnings , he has had six figure salary for ten years, you have averaged $60K at best , and likely spent three years either unemployed or under employed.
Yes be a Cadet & Go Direct to the Jet