How long is the judging / voting period expected to take once the contest ends?

If all goes well, we'll be announcing top 10 end of December, and the winners announced by Mid to late January.

Also when does voting start for people's choice?

Voting for people's choice starts soon after the submission period ends and will be closed when we announce the top 10 which should be near the end of December (we don't want placement in the top 10 by the judges to influence voting).