If costs get low enough, it might be possible to do multiple delivery attempts per day. Something like "your delivery device will be on your block at 7:00, 9:00

If costs get low enough, it might be possible to do multiple delivery attempts per day. Something like "your delivery device will be on your block at 7:00, 9:00, 12:00, 3:00, 6:00 and 8:00". Or, more optimally, you would configure delivery windows and tell it when someone will be available and they schedule one or two delivery times in that window.