I’m in the US. There’s not a legal age where you’re allowed to leave your child home alone, but it’s generally accepted that you can’t until they’re 12. Of course you could get away with running an errand, but not a week off school, much less a whole summer. You could be charged with neglect, or worse if something bad happened while they were alone. Hard to find any career that’s not gig work that can accommodate 12 years of flexibility :(