@Raggytash and SBP-Cooperator
Well I have no idea, but suspect that it will work out in the usual inter British way, just like it was back in the day. Used be a joke that there is a border between the UK and ROI, because in effect the only thing they stopped travelers for was liquor and tobacco. No passports or any of that sort of silly thing. They were, for most of us, happy times.
But there is enormous changes to property value in the ROI. Some cities are as expensive as UK, so be ready to dosh up a lot of loot if buying a home. Yet there remain bargains in the countryside just like you'll find in the UK.
Retiring there is somewhat of an industry as lots go from here, and Australia etc. I suspect Co. Clare prices are a bit of a shock, - music business and so on- but then who wants to move to a cosmopolitan community even if in Ireland? I certainly would not want that.
Yet I think this BrokesIt will bring folks to their senses and get a better deal for the UK than is now on the table, including retaining the relaxed UK / ROI relationship, so nothing will change for retiring from there to the wee green island.