Please be more specific...
Where are you staying, onsite or off, hotel or campground?
Are you driving or flying?
Are you renting a car? Using transfers? Paying for parking?
Will you need an overnight stop enroute?
Which park passes did you get, for what ages, how much?
Do you plan to eat groceries & use a cooler or fridge, eat out at counter service or sitdown restaurants? Which ones?
Are you big shoppers, for souvenirs?
Now, which expenses need to be included in your $2,000?
We've done WDW for a week for $2,000 for our family of 5. We've also spent over $5,500 for a week. And we're not concierge, eat at V&A's kind of people. Still, it can vary a lot. Give us more detail and we can help more. And moving this to the Budget board would help too.