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I think I'd be hit with enough income tax on renting it out that it wouldn't make it viable.
In an ideal world we'd just port the mortgage to RoI where we have family outside of the city, but that's not all rosy either. Personal tax is crippling in Ireland (you're into the higher rate of income tax at 33k EUR, motor tax is higher, tax on food and drink is higher, and healthcare is not free), and infrastructure is woeful.
You'd think not being tied to a location with work is a godsend, but actually it makes picking a location to live even more confusing. The only criteria now is access to fibre power broadband.
Have you thought about renting out your current place and trying somewhere else first?