having just researched this for a mate, I can tell you a couple of things.
25 is not old!
There are 3 schools in Melbourne that you can get the vet fee help.Swinburne, RMIT and the school at bachus marsh who's name I forget.
Swinburne is a 3 year course, Bachus Marsh is about 18 months and Rmit is one year.
regardless of what school you choose, it is an extremely expensive way to do it, but if you are driven, and I mean really driven, you will be able to get through within the time allotted and you will be doing it in brand new aircraft in good facilities.
Uni's are not like your typical organisations, and they will have a different feel to them totally than other places you may have learned at.
Take your time making a decision about how to do it.
If all you want is your ATPL theory, then source other ways, but if you need the flying as well, then maybe it will be for you.