What the others are saying about having children and flying is correct. If you get an interview for Virgin or already have one just go. You will find out the most up-to-date information from the company regarding Perth's flying schedule and what layovers are going to look like. Then make an informed decison regarding your family and the job.
As mentioned training is intense and you have alot of revision you need to do at night. If you want to fly why not try other airlines that either don't overnight or have a shorter initial training period.