Many moons ago, I did my basic training two days each weekend (one flight each day) with quite a reasonable pre and post-flight brief each day.
Then more my navigation flights, once a week until completion of PPL.
All up about 4 months of actual time but there was a break of 4 weeks in the middle due to an overseas holiday, so more like 3 months.
Perhaps a bit more to do PPL if you do a CSU/Retract at the same time.
Depending upon where you live in Australia (I am in Perth) I highly recommend doing this over autumn/winter/spring. The summer thermals and temperatures aren't much fun. Winter flying is just gorgeous.
For hour building during CPL phase, get your mates signed up for a big cross-country adventure and they can cost share with you.