Thank you for this post and all the extremely helpful information! I am struggling to get my brain wrapped around this and my head is still kind of spinning in circles.
If I am considering buying into DVC with a 75pt resale contract with the intent of traveling every 3 years, or at most every other year (since those are the only scenarios where I can get the numbers to look favorable for me), then I would be relying heavily on banking and borrowing to have 225pts every 3 years. And I'm thinking that it also makes the choice of use year more important too. So I want to have a good understanding of how this all would work.
If I guess that we'd likely travel in August, but perhaps sometimes in June or July, and rarely but possibly at other times, what use year is our best bet?
If I go with August for the sake of the example and buy in today, do I have this right:
1) On 8/1/2011, I get 75 points for the 2011 use year, which runs 8/1/2011 to 7/31/2012.
2) On 9/15/2011, I can call and book a reservation at my home resort (probably AKV) for August 15, 2012, (11 months prior) which falls in my 2012 use year, requiring 225 points. At that time, all 75 of 2011 points would be banked, I would use my 2012 points, and borrow all 75 of my 2013 points.
3) If all is fine, I am done. But if I need to cancel in February 2012, I get all my points back because I am more than 31 days before checkin, but I now have all 225 points in the 2012 use year. (Right? They stay in the year that the reservation was made?)
4) If I act before the end of March 2012, I could bank 75 current year points into the 2013 use year, but would have to use the other 150 banked and borrowed points by the end of my 2012 use year or 7/31/2013. But since it's only March, I would still be able to take advantage of the 11-month booking for summer 2013 so should have good options.
5) If I don't act before the end of March 2012, I am past the banking deadline so have to use all 225 by the end of my 2012 use year. (Right?)
6) If I cancel in July 2012, within 30 days of checkin, my 225 points all go into holding and I have to use them by the end of my 2012 use year but cannot book more than 60 days ahead. If I don't use them, they're gone.
So using this approach, I would call at the 11-month window in September to book a trip for the following August; I'd basically have until the end of March banking deadline to cancel if needed and either use 150 points the following June or July and bank 75 into the next year, or I could cancel up until July and use all 225 points the following June or July or whenever but with 60 day max advance reservations. Have I got this right?

Thank you!