I find it interesting that grandparents who go to WDW yearly would be warning you against it and thus preventing their grandchildren of taking this magical vacation. When I've done the math, Disney is an excellent value for a family vacation. If you compare it to cruising, going to Mexico, or touring just about any city in the U.S., you'll see the value. I'd not only run the numbers for Disney but show him the cost of other vacations to clearly illustrate that. We take vacations every year, and I run the complete numbers for various choices.
In Orlando you can get great deals on accomodations or go for
luxury.
www.mousesavers.com can help you save money. I'd get the Orlando Magic Card which will come with a booklet of accomodations that offer discounts for it. You will find homes with pools for very reasonable rates along with almost endless hotel rooms. You can pay as little as $30 a night for a very basic hotel room or pay 10 times that for deluxe on-site. Time of year is important for getting discounts on accomodations.
To Include in the Budget:
Transportation - driving or flying and getting rental car?
Gas - either way you'll use some of this, but you would if you stayed home, too.
Accomodations - Get the Orlando Magic Card which comes with a booklet of accomodations and discounted rates. You can even rent a home with a pool for very reasonable rates. There's a better selection of places to stay in Orlando than anywhere. Pick how much you want to spend or what amenities you want and go from there. We've paid $55/nt for a beautiful 2 bedroom with full kitchen and huge whirlpool tub because we sat through a timeshare presentation.
www.mousesavers.com can help you save $$ on-site.
Parking if staying off site - $7/day - If flying, parking for your car at the airport or limo service to airport
Passes - rates are at
www.wdwig.com, and sometimes wholesalers can save you a few bucks.
Food - plenty of leeway here.
www.wdwig.com has menus, and you can opt to do your own food.
Souvies
Taxes - remember that hotel rooms have taxes, restaurant food has taxes
Stroller - take yours or rent
For your size of family and length of trip I would say you can do this for $1500 - $2000 if you drive and watch the budget. Certainly you could pay more, and if you eat P.B., camp or get a Priceline hotel for $20, and don't buy souvies, you could spend less. If you stay at the Poly, have character meals, go to water parks, and fly, you'll spend a whole lot more.