Without wanting to be "that" poster, Disney in Orlando is "DisneyWorld" - "DisneyLand" is in California, "DisneyLand Paris" is well y'know!
We did our first ever trip to Orlando earlier this year (over Easter/Spring Break). I'm not going to lie it was NOT cheap, however we did make certain choices that we could have saved money on had we done things differently but we wanted to experience the Disney Bubble.
For 2 Adults and 2 kids (7yo and 10yo - note that over 9 is classified as adult) staying 11 nights at Caribbean Beach Resort (a "moderate") in a preferred room we paid about £9,500 which was flights, hotel, park tickets, etc.
We saved some money by taking indirect flights (flew Heathrow to Newark then Newark to Orlando and same in reverse, but timed it so we were in Orlando by 8pm).
Staying in a cheaper Disney hotel would also have saved money but we liked the location of CBR and access to the Skyliner.
It is definitely cheaper staying off site but you have to factor in additional costs such as parking which is $30 per day and also allow for the fact that you don't get early access to the parks - we found this a gamechanger as we were able to ride all of the most popular rides before the parks opened to everyone which meant we didn't have massive wait times even though we were there at one of the busiest times of the year.
We worked out we spent about £2,000 on food and souvenirs while we were there, we didn't qualify for the free dining plan as they block out the whole Spring Break period from that offer.
If you go in the summer it is a cheaper AND you get the free dining package but you have to contend with the Florida heat! Personally speaking I would rather pay more than melt in the humidity!
That all said we absolutely loved it! The kids actually cried when we left as they didn't want to come home and I would go back in a heartbeat. However if (when!) we go again we'd probably do 5 days at Disney, again staying at CBR so that we get the early park access, and then we'd also do a few days at Universal, go to Cape Canaveral, etc.
Feel free to ask any questions - I became a total Disney-bore in preparation for that holiday!