Holidays and travel in general is increasingly more and more expensive. I have a lot of sympathy for people with children who might be limited to school holidays when the prices are that much higher.
I've found North Africa really interesting or the Middle East (but I totally appreciate the reluctance with going there right now). It might cost you overall the same as a short haul trip to Europe for a holiday but with the added benefit that it's somewhere newer and more exciting than Europe can offer.
There's a whole world out there to explore and it's a shame that expense is the major limiting factor in doing that (time and distance largely being conquered).
Failing this, take a trip up to God's Own Country ™️, Yorkshire.