Looks good, but the price of accommodation in Cork is seriously insane. More per night in October for a three-star or a B&B than I paid for a four star hotel in Jersey in June. It's actually a lot cheaper (75% chraper!) to get the train back to Portlaoise on the Saturday and back south on the Sunday - but thay means missing Cobh and, more importantly (for me at least) Midleton. Will keep looking, but it looks like a no. Adding two nights hotel in Dublin will also affect GB bookings I suspect!
MD