Gus

The other half of why daily matters is that small birds hide illness until they cannot, and then they go downhill in hours rather than days. A person who sees them every day catches it; a camera does not, because the bird looks normal right up until it does not.

Then the ordinary accidents. A toe caught in a toy, a scrap between the two of them, a night fright that takes a blood feather, a cage door that works itself open. All survivable if found the same day.

You are wrong, and the reason is the one nobody expects. Budgies eat the seed and leave the husk, and a bowl full of empty husks looks exactly like a bowl full of seed from more than a foot away. A bird can starve next to what appears to be a full dish.

That alone kills the plan, because the failure is invisible and nobody is there to blow across the top of the bowl. Add water that gets food dunked in it and pooped in within a day or two and you have two problems by Tuesday of a seven day trip.