I've been hearing that for at least 30 years. All the pieces are ready - they just have to put them together. Take a couple of days. Where are they going to kill the animals? Who will kill the animals? They have no priesthood.
The Temple Institute is a con. It's a small museum to make money off of mentally-challenged-Christian-Zionists-working-for-the-Devil who visit to Israel. The Israeli government is making no effort to move toward building a temple. Most Jews have no interest in building a temple. Those Jews who want to build a temple only want it for ethnic pride, not any religious reason. Orthodox Jews activity oppose the building of a temple. Not only do they not have a priesthood, their Talmudic religion doesn't have a priesthood. Christianity, of course, has no room for a third temple and can never recognize a third temple as anything other than a satanic shrine.