Well, they may or may not have a code next year. Who knows? If your trip is too expensive, you can always downgrade some of your WDW options. We are going this December and are taking our 4 kids and MIL. That's 7 people and we have two preferred rooms at All-Star movies and the basic dining plan and 8 day hoppers and our trip is about $4,200.00. So, unless your family is much larger than ours and you are staying much longer, you can stay-on site, with the dining plan, a lot less than $12,000.00.
Well we are 7 people staying at POP standard (Dec 13-26). All considered adults on the DDP (basic). The price includes MVMCP tickets, airline tickets, and the 600 dollars needed for dining gratuity. I know airlines tickets are not part of Disney but it is part of a Disney vacation.