i'm appling for my wife children to come to the US. they are currently in the PH. We did the I-130 and got approved for both. one case was already sent to NVC and I have the case and invoice number. the other case approved yesterday so hopefully i'll get a case number next week. I asking if I wait until both are at the NVC and then pay the fees and paperwork at the same time or just start doing the one I have now and wait for the other and start that one? Also how long is the general waiti time for the interview? I want to have both on the same day instead of them being far apart because we are flying over for the interviews and we have one month to go to both interviews and hopefully get the visas and come back here. How long is the wait from documents complete to the interview time in the PH. I know 5 years ago when my wife came here it was 2 weeks from documents complete to the interview. and after the interview she had her visa in 2-3 weeks. but we are trying to go over there in march or april hopefully. Is there a way I can contact them and ask if they can do both intervews at the same time?