I interviewed the week of Oct. 24th and received a call for a class date that same week. Class starts on November 10th. My guess is this: since class is starting on a Thursday, they'll keep us in ground school that first weekend, (maybe the second weekend, as well), and try to get us out of there before the Thanksgiving weekend. Then it'll be off to LGA for the sim, followed by IOE somewhere, so we're up and running before their busy (Christmas) season. But that's just my guess.
As for available bases, I was not given any clues.