It's just too expensive to holiday here.
Friends of ours went to a camp on donegal last year for 5 days... They went to a camp on France this year and it cost less and they got 2 days extra..
Depending on the age of the kids and if they would enjoy it or not, we used to go to euro Disney and it would usually cost about 1800 for flights, accommodation, park tickets... And we would usually use about 1k-1200 spending... Mainly because you are eating out 100% of the time so you will spend 150-200 a day on food..
That would be for 4 days and 3 nights.. It's a lot for that duration but the experience for children if the correct age can't be beaten.