Our school system shifted the school start times one hour later, so a lot of parents are having to make this decision. If you have to leave for work, there’s not much else you can do, unless you have a neighbor who can come by in the morning.
For the right kid, this might not be a problem. Help him get everything ready the night before — school bag, clothes, lunch, something for breakfast, whatever he needs to get out the door I’d definitely get him a cell phone — you can put strict parental controls on it, but if he’s alone, it’s basic safety equipment. I would also contact the school system and ask if they can have the bus stop at your house — if he’s the only kid at the stop, they might make the change.