BoogerMan, I don't believe it's fake. I checked out the journalist's LinkedIn profile and his website and they give no reason to think he's a faker.
As you rightly point out, 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.
The three companies the journalist mentions - Mina Asset Management Ltd, Mina Treasury Services Ltd and Lepta Payment Solutions Ltd - all have their registered address as "Watch Tower House, Newcastle, Wicklow, AF63 RF61".
Mina Treasury Services Ltd was set up on 24th July 2024 and has the following directors - David Petrus (Bethel, Warwick, USA), Joachim Szewczyk (Bethel, Selters, Germany), Michael White (Galway, Ireland), Stephen Charles Hale Symonds (Bethel, Chelmsford, UK).
Mina Asset Management Ltd was set up on 13th August 2024 and has the following directors - Nathan Boccaccio (Kilkenny, Ireland), Nolan Vengethasamy (Bethel, Warwick, USA), Philip Lofts (UBS executive, New Canaan, USA), Stuart Bull (Bethel, Denham Court, Australia), Tobias Broweleit (Bethel, Warwick, USA), Vassilios Pappas (MD of Assenagon Asset Management, Gruenwald, Germany).
Lepta Payment Solutions Ltd was set up on 16th August 2024 and has the following directors - Francesco Tirelli (Egham, Surrey, UK) and Stuart Bull (Bethel, Denham Court, Australia).
Check out the article for the banking credentials of these directors.