Canary Islands can be a good place to go on a budget. Go B&B in an apart hotel or self cater. Eating out fairly cheap.
If B&B, have a big late breakfast at the buffet, late lunch out somewhere. If DCs are small this can work quite well as you can then just have nibbles and wine on the terrace in the evening. Couple of trips to the supermarket/local shop for drinks, ice creams, snacks, easy food like bread, meat, cheese, olives, crisps. Make sure your partner and DC if old enough pull their weight and just do as little as possible.
I read about people cleaning bathrooms, tidying and preparing complex meals while self catering, which is all completely unnecessary. Just sit on the terrace and ignore the mess in the living room and all you need to do is minimal washing up to keep the kitchen usable.
Or you can chance your arm with AI, but food not guaranteed to be to your taste and you're kind of stuck with it, as you've paid for it, but look on jet2holidays for free child places offers.