Me I'm very ignorant about all this but weren't there Jews left behind in Jerusalem who could easily have began preparations particularly as they were working class and likely to be the kind to do most of the actual rebuilding / cleaning etc?.
Jeffro I was referring to preparations for making the trip from Babylon to Jerusalem rather than preparation for rebuilding Jerusalem.
Apologies for the confusion I didn't put it very clearly. What I meant was that having people in and around Jerusalem (probably old servants & their famillies) would help speed up preparations. (I'm sure they dispatched messengers to Jerusalem straight away) I just imagined they wouldn't need to take so much if things were waiting on their arrival? Just a supposition that would speed up the job?