In
Ireland choice will be limited in small towns, even if there are places to hire cars local to you, " it wont be too easy to find ". I would suggest to hire one online and will be ready for you at the airport and you can always drop it off at the airport when you leave.You can do that here
Ireland car rental ACE car rental prices are about €33.00/day. I recommend a look here at
things to do in Ireland before you go, you might find some valuable information. Here is another link that coul help you
transportation. I hope this helps!