There's no doubt in my mind they could build it in a year. The real questions is this: have the plans been drawn up yet?
One big question in my mind is under what circumstances the Islamofascists would tolerate a Temple of any kind on that piece of real estate.
One very exciting development is the fact that Israel apparently now has more than one kosher red heifer ready for sacrifices in the Temple.
I would say that plans are well underway!