The barn is nice. It is directly behind the Duleek Church bus stop - so that makes it easy when describing for cabs or to check the bus route. The Drogheda Bus Station is the central location (only one stop away from Duleek Church) where you can pick up a bus to Dublin or anywhere else. The Train station is ~ 20 Euro cab ride to get the Enterprise train to Belfast (or Dublin). Book a round trip ticket online to Belfast to get the best deal.
It seems all Irish beds are either double or King and are shorter than American bed sizes. There aren't any Queen size beds. The Double Bed is a bit uncomfortable for anyone over 5'10" - if staying for a long period. The coffee shop across the street (BEO) is a must and the convenience stores (one at each end of town) have most of what you would want. Overall it is a fantastic place and Karla is great!