Here are some average numbers. You will have to do the math and your mileage may vary LOL!
Quick Serve Meals $25 each
Sit Down Meal $50-125 each (can go way higher with aps, drinks, etc)
Water $4
Coffee $5-8
Snack $5-10
Tips (plan to cash in $100 for $1's, $5's and $10's)
There are no coffee makers or toasters at value resorts. If you are taking a car service from the airport, have the driver stop at
Walmart so you can pick up one. Divide and conquer if you make this stop with all three of you getting a "list" to shop in different departments to make it quicker! We haven't ordered for delivery, but many others do...
You need case(s) of water (you can ask for them at the store at your resort), peanut butter crackers and/or granola bars, coffee creamer, coffee, filters, fruit, cheese, yogurt, cream cheese, jam, pastries etc. It is best to eat something before you head out and make sure everyone has a snack in their pocket and a bottle of water. (Savings at least $20 per person per day). If you can pick this stuff up or have delivered, you will save a bundle rather than buying at the resort store.
Kid's meals are an option, but I think it is better to order a couple entrees and split them. Some snacks are large (funnel cakes at US EPCOT) and you can all enjoy one to split three ways! I often have an ap rather than an entree at a sit down meal. Allears.net is my go to for menus. Much better to have a few options that you know everyone likes rather than staring at menus a few times a day - time waster!
I don't know how you plan to handle "extras" for your daughter, but I would recommend buying a Disney gift card when you arrive for a reasonable amount of money so she can have a bit of independence in buying a treat if she wishes. Perhaps she has a part time job where she can stash a bit of cash for the trip?
Plan on spending more than you expect and you won't be disappointed.
If you plan on one or more ADR's I would recommend Boma (dinner) and go early to enjoy the lobby and animals, Topolino's (character breakfast and/or dinner), Steakhouse71 (any meal) easy to get to on the Resort Monorail.
Plan a pool/lazy afternoon or day and recover and maybe do laundry. Disney Springs is good for that evening. We love Chicken Guy yum!
You can't do it all so don't stress out trying. Have loose plans and a backup plan each day. Have a wonderful trip!
