"...the Irish Bethel was put up for sale by Mason Owen Lyons in 2011, but it seems that it was never sold, as Google Maps from June 2023 shows the JW.org sign still at the gate, and it is no longer advertised by Mason Owen Lyons."
That raises many questions and possibilities, if it didn't sell*. Did they initially try to sell in a difficult market and then hang on to the property in the hope of a better price in the future? It surely must have appreciated in value by now, so why are they hanging on to it? Are they still occupying and using it in some fashion? Was it so purpose-built for WT use that it makes no sense for any sane investor to buy it**?
*How does one find out who owns property in Ireland? The JW.org sign doesn't prove much; the new owner may never gotten around to removing it. Perhaps asking the agent if it sold?
**That they want to sell it for the value of land and buildings, but anyone buying it would probably want to buy it for land value only, because they'd need to knock down the buildings?