Hello Steff,
April will be here soon, that's very exciting! Your itinerary looks great, you will have plenty of time to explore the surroundings of the places you plan to visit.
There is budget accommodation such as
youth hostels that we can recommend, however as they are much more affordable they might have less facilities than the luxury options.
An idea for a short day trip near Dublin Airport could be a visit to the lovely seaside town of Malahide, which boasts an interesting
castle with gardens.
I hope this is helpful! Enjoy the planning for your upcoming Ireland holiday and again, please feel free to ask us more questions.
Kind regards,
Vera