We stayed offsite in a villa and had a hire car. At breakfast at home most mornings. I prefer the more laid back nature of a villa and trying all the non park restaurants. Save money that way too.
heading to carribean beach resort on may 3rd for 2 weeks. for 2 adults 2 children and infant cost us 4k with dining plan and tickets. with thomson. booked last june.
13 days £3.037 https://www.tui.co.uk/destinations/packages?airports=MAN&units=000210:DESTINATION&when=25-04-2018&until=&flexibility=true&flexibleDays=3&noOfAdults=2&noOfChildren=2&childrenAge=15,12&duration=7114&searchRequestType=ins&searchType=search&sp=true&multiSelect=true&room=&isVilla=false&im_id=affiliate&ia_id=7988612&ip_id=13101521 double this price summer 2018
To do everything, I'd recommend 2 weeks. 7 days is not enough, you would feel you rushed everything but that might be plenty to other people.
Price now £ 1431.60 for 6 nights £357.90 per person