We just returned from a 2 1/2 week trip. We found that renting a car from Dan Dooley at Shannon was a bit cheaper than other options. (We had to take a shuttle to the rental location, but it was fine.) More credit cards cover CDW in Ireland than was the case just a couple of years ago. We used a Visa that offered primary insurance, which meant we had to bring a letter proving coverage with us.
If we'd wanted or needed to chose a rental that included the insurance, easytourireland.com was supposedly a good place to rent from.
On our previous two trips, we stayed in B&Bs. This trip, we stayed in hotels, plus an apartment for a few nights. Most of the hotels covered breakfast in our rate. The ones that didn't offered it for a fair rate, around 10E per person. Breakfasts were substantial, so we just ate some yogurt or something like that for lunch.
The current Lonely Planet Guide for Ireland, and Rick Steve's guide both listed reasonable restaurant and pub options for dinner.
You can a buy a Heritage card that will cover many of the tourist sites. We didn't buy it because we'd done most of those on previous trips.
I'd advise renting as small a car as can fit all of you (plus luggage) in reasonable comfort. The roads are often extremely narrow and windy. In the countryside, you'll find yourself backing up just so someone coming in the opposite direction can pass you. You won't want anything that's bigger than necessary!
LOL! Sounds like the roads will be the biggest obstacle in the trip!
I'll check into the Heritage Card to see if it is something we might benefit from. We are more about seeing the real Ireland rather than too much tourist Ireland. But who knows?! We may turn into typical tourists once we get there!
The guides you mentioned sound like great help in having a clue about meal options.
Thank for the tip about the rental car insurance. I usually check with my agent before renting any vehicle, so hopefully she can give me whatever proof of coverage we will need.