Again, the problem is that as soon as it's built, you more or less know the date of the second advent. Scripture categorically precludes the possibility of such knowledge. Any attempt to commence building such a structure would immediately provoke WWIII. Or Armageddon, if you prefer.
If Trump is to be the enabler of such a project, then you must also believe that this temple has to be constructed within the next 8 yrs, as I suggested in one of my replies to rainy. In which case, we will all soon know one way or the other. Beyond that, further speculation is fruitless and pointless.