Hi, I also picked the 7 night trip as well. I would love to see a budget for a trip wherein you would switch hotels for variety(ie. the cost of renting DVC points for a Sun-Thurs stay with off nights at PC, or 2 nights PC with rest of nights at Moderate or Deluxe). Technically, you would only need to buy 5 day PHP passes and use the pluses for a day at waterpark and PI. I am also one who has to do a character meal and one really nice meal at someplace like LeCellier. My next trip budget is being based off of what I have listed above for 2 adults driving to Disney. Largest $$ are always spent on lodging and food. I really like the idea of renting DVC points as you get a deluxe stay at moderate price plus have the extras including refrigerator and microwave. This way saves on breakfast items (bring them from home) and snacks/softdrinks as well. You'll probably come up with a great budget and Disney will then come out with some new package right after to throw your budget out the door. I have to admit that the FTP was the absolute best and one of the cheapest trips that I have had there to date.
P.S. - when you come up with the budget for family of four, add in a night for the kids at Fort Wilderness with sing along with Chip and Dale and smores purchase or Hayride.