waterford-dublin dublin-limerick

[IckyThump]

ok so on friday coming i need to make the journey from waterford to dublin. after that i need to travel to limerick

i am a student so i can get discounted fairs

student return limerick-dublin is €20
student return waterford-dublin is €20 (online quoted @ €18.50)

the usual one way student fair is approx €14.50 or €14.99 something like that.

after loads of online research i see that a ticket can be valid for other lines than the one that was paid for. ie: i travel kilkenny to dublin but board at warford and pay the difference.

ok my question is. is there anyone here that has travelled a similar attern an knows of the cheapest way to do this trip?

i can book waterford to dublin now online for adult price of €9.99 and then pay what ever the fair is for student(hopefully €14.99) at the vending machine for the trip to limerick.

this would cost €25 which isntbad but if i can do this for €20 it would be better. not every student has booze cash that can be spent in others areas of life

thanks everyone in advance