We are paying for travel down (driving from Ontario, Canada), food, and lodging (since we are a family of 5 we needed to upgrade to a 2 bedroom anyways, which is what started it all

).
We are only doing 2 days at Disney (Epcot on the 6th and MK on the 11th). The parents are paying for those tickets.
Unfortunately (or fortunately for some) the week we go is the first week of
MVMCP. We have done it before and I much preferred
MNSSHP. We told the girls if they want to do it, then it needs to come out of their pockets (they both have paper routes and are savers). We will pay for us and the little guy, and the girls will need to pay for themselves and their friend (they both have paper routes and that money has never been touched). It was not worth $700 ($940 Canadian!!) for the 7 of us to go in my opinion, so we will see how badly they want to go.
Their parents need to give them money for souvenirs.