Originally Posted by NotADreamerPerSe

After the waiver is approved, you need to file the affidavit of support and something else which I can't remember, then NVC gives you a date for your interview in your home country. From what I've read, how long you're gone for depends on the country, but the general consensus seems to be around three weeks as you need to go get your medical exam and wait for the results to be ready and also need your police records. Obviously you need those for the interview and after that, if approved, you wait a couple of days and then you get to come back home.