About the most likely outcome of going to OAA jus now is a job with Ryanair. I think there stats for this year tell it all. Thats 70 to 80 k for your course, and anothe 25 k for your TR. Theres also no pay for the first 3 months, only half pay for the next 6 months.
Thats 100k you'll be spending. As a slight aside, Ryanair dont give a monkeys 2 hoots what kind(modular/integrated) of student they take. save your cash and go modular given the current climate. You'll get the same job at the end of the day