Interesting that you bring this up, as it is one of my points in my speech. A lot of people think it is significantly more expensive than other vacation destinations, but I have a price comparison, as an example.
Last August, my family (DH, DS12, and myself) took a trip to Chicago. We drove, as it's only an 8-hour drive (and much cheaper than a flight). Our hotel was completely free (thanks to my brother), so that saved us $200/night, and parking was free (also thanks to my brother), saving us another $50/night.
So I compared my actual Chicago trip costs plus what I would have paid for hotel and parking, to an acutal Disney trip for my same family of three during free dining this coming August. The Chicago trip was four days, but Disney would most definitely be seven days, so that is what I used.
Also, since we're trying to show how budget friendly this can be, I used the value resort pricing with the free quick service dining plan
Here are the results:
Disney trip pricing
2 adults, 1-13 year old
Value resort, standard room
Aug 25-Sept 1 (7 nights)
7-day Park hopper tickets
Price without dining $1588.44
Price with QS dining plan added $2260.23
Price for flight from Minneapolis (Southwest) for three people: $746.40
Total price with dining and flight: $3006.63
Park & Fly hotel in the cities: $150
Free transportation to and from Orlando airport (Disney’s Magical Express)
Free dining price (park & fly hotel, hotel, tickets, and flight): $2484.84 for 7 nights = $354.97/night total for the trip
Comparison: Trip to Chicago for 4 nights
same three people, driving instead of flying
$1500 (my total costs for the trip) for 4 nights = $375/night for the trip
and the hotel and parking were free! (Savings of $199/night for the hotel = $796 plus taxes of $122.58 = 918.58 more and $50/night for the parking = $200 more)
$1500 plus hotel and parking would have been: $2618.58 for 4 nights - $654.64/night
I hope that's easy enough to understand. I will be revising it on a powerpoint slide so it is easier to understand. I think it's pretty easy to see that even if I had stayed in Chicago for seven nights for the same amount of money, Disney still wins!