July 2018 flights for family of 5 @ £1,800 - but is it worth it when you add it all up...

[popdriver]

I am calling on all your wisdom to tell me to stop pontificating and just book this;

We are 2 Aduults, 3 kids 14/13/8

Possible flights leaving at the end of July 2018

Outbound Flights Journey Duration: 12 hrs 25 minutes
Leeds Bradford to London Heathrow, UK
Changeover Duration: 1 hr 50
LHR to Miami International, Florida - USA

Return Flights Journey Duration: 15 hrs 20 minutes

Miami International, Florida - USA to Chicago O'Hare Intl, Illinois - USA
Changeover Duration: 1 hr 20 minutes
Chicago O'Hare Intl, Illinois - USA to London Heathrow, UK
Changeover Duration: 1 hr 45 minutes
London Heathrow to Leeds Bradford

5 nights in universal Loews Royal Pacific
18 days 7 seater mini van [only a mini van for luggage purposes] car is all in with zero,excess

Costs

Flights £1807
Hotel £836
Car £610

Total £3266

Questions;

Do you think these flights are sensible?
Is the 3 flight return leg stupid?


Our plan is 5 nights on site for universal and then bag a villa & do Disney & other stuff for 13 nights

That takes the budget to;

Flights / car / hotel £3,266
Villa £1100 [bases on what we paid this year]

Disney & universal £2953

Total is £7319 for 18 nights +spends

Any tips on how to talk to the kids & wife from avoiding Disney & save cash? Lol