Took my 2 kids to Orlando this month for a holiday of a lifetime. Basically I finally sold my house after years of scraping by after split.
It was something I had always wanted to do never mind the kids
(universal more than disney)
I spent hours online getting cheapest flights and cheap but great accomodation (appartment in a hotel not at a park) and getting the tickets online cheaper than source. I was so worried, swithering about spending the money (as up till now had to count every penny) I phoned my closest relative and asked them about it, they said dont be a dick just bloody click the button, you all deserve it, I took a deep breath and pressed the button 
We had a whale of a time, memories to last a lifetime. If I won the lottery I would do it again (not in high summer heat nearly killed me at times lol) and do other attractions like space centre, airboats and do Universal again as there wasnt enough time to do it all. We had to have odd days at 'hotel' just to chill out (the parks are so big you seem to walk miles!) and kids had to be dragged out the pool at night 
If you have the money whether its because you saved up for years, or you can afford it without hardship then its up to you how much you spend on a holiday. TBH I got 3 direct flights and a nice appartment (with breakfast) for under £3k tickets were £1200 for unlimited 2 week access for 3 adults (kids over 9 = adults!) for all the disney and universal parks (except seaworld) so less than a lot of people spend just going to euro disney for 2 weeks.
If it appeals to you go, enjoy!
As I said wont be doing it again anytime soon but it was definately worth it for us. Its horses for courses, not everyones cup of tea. I couldnt go and lie on a beach in spain for 2 weeks, would be bored to tears, cant even do it at home and we live 5 minutes from 2 lovely beaches. Half an hour and I am twitching to do something!