Consider renting a car to easily travel around the country. Alternatively, public transportation via train or bus is also an option. Expect to spend around €100-€200 on gas or transportation costs throughout the trip, depending on the mode of transportation and the distance traveled.
If you have more time, consider visiting the Ring of Kerry, Giant's Causeway, or the Aran Islands. If you have less time, you could skip a day trip or two and spend more time exploring Dublin or County Kerry.
Dublin Airport (DUB) is the main airport in Ireland and is located about 6.5 miles from Dublin city center. Shannon Airport (SNN) is located about 15 miles from County Clare and is another airport option for travelers.