How long will it take to build the new temple?
Good question. All we know for sure is that one of the provisions of the treaty that begins Daniel’s 70th week seems to be the go ahead on the Temple’s construction, because in the middle of that last 7 years the anti Christ desecrates the Temple. (Daniel 9:27) So at most it could take approximately three years.
Some say that preliminary work has been going on for some time now. No one’s saying just how much of the Temple has been or even can be pre-fabricated but rumors surface from time to time. I think that once the decision is made, construction will progress rapidly and the Temple will be in full use well before the abomination of desolation.