I've no idea where you'd want to go/when/age of child, and prices are definitely on the rise and will be for the considerable future, but you can still get away for a little over £2k-£2.5k next summer.
The 'free' child places with ops like TUI/Jet2 will always help (though sometimes I'm dubious about how ''free'' they actually are)
View attachment 72074
View attachment 72075
View attachment 72077
View attachment 72078
I went to Puerto Rico in Gran Canaria last summer, it's one of the cheapest resorts I've ever been to.
Lots of self cater places to stay, wouldn't need to do AI there.
View attachment 72079