3 new people lining up for voice work

I think there are one too many people wanting to do the movie. Casting has officially stopped until I announce that a voice actor cannot do it (I surely hope I don't have to type that one up). I have set a deadline for the sample lines of all 2, 3 characters to come in by the end of January, and all the voice overs in about 5 days later. I'm pushing them, but I'm going back to school on the 11th, so I'd like to get it done by then and have nothing invading the progress of the movie.