There's basically only 4 schools in AD (apart from UniSA)
Bruce Hartwig's (Bruce actually works for FTA but left his name on the school)
Adelaide Flight Training Centre
Forsyth Aviation
Air South Training
Would highly recommend your friend visits each of those 4 schools, comparing rates and instructors. Don't be swayed by shiny new aircraft, it's all about instructional quality. I'm pretty sure each of those schools has an ATO that works for them. If you're still struggling to make up your mind, I'm sure you'll get a bunch of PMs advising you on the good and the bad