To be clear, this is a practice replica, not the real thing.
Jews in every generation have made such preparations. The saintly Chofetz Chaim in the 19th century could be found running up and down stairs. He was a kohen and wanted to be ready for temple service.
Yeah, but THIS time it's DIFFERENT! Or so say the date-setters and headline eschatologists.
That happened in 1948. Now the preparations for a rebuilt Temple, especially in conjunction with all the other signs of Christ's soon return, are very important.