indicate that the Irish are currently promoting opportunities to work remotely and plan to provide better infrastructure to do so to include remote worker "hubs," regardless of the consequences of pandemic control. Even though your experience is in Banking, there are likely spots where anything "financial" would be appropriate for remote work. With your requirement for a certain level of income unclear to support your best possible life there: housing costs, transportation, expectations for cultural/social engagement costs...I'd suggest you connect (network) with organizations in global HR recruiting for better and more "real" information - there seems to be a lot of "hype" about remote employment's growth in Ireland and its future in Ireland and/or the need for extended visa depending on already acquired or desire to acquire permanent status and/or citizenship status there...would a call or in-person appointment to their embassy offer you information on employment and visa requirements as you age and work as well.
Just my thoughts...I knew some Scottish neighbors that lived next to his father from the 60s(?) on permanent visas here that they had acquired at some point post WWII; neither ever became American citizens They did move back to the UK/Scotland upon retirement along with their grown kids families where they had lots of relatives. She did not work; he was an employee for a mover of household goods at the time of retirement - unclear about their personal financial status over the years. Both spoke English in a way I had considerable difficulty understanding, even after so many years in the USA--wonderful neighbors that DH and I were sad to see leave.