I’d say go for it. It’s not the ideal world but I think the odds are pretty good of things working out as long as that egg is viable.
Turning is not all that important after 14 days. Don’t worry about that part.
There can easily be 15 hours difference in hatching times for eggs even if they were started at the same time. It’s possible they could run into some types of problems, but the odds are reasonable the difference won’t cause a big problem. Chicks can go for 3 days without food or water after hatch because they absorb the yolk. That egg should hatch within that time period.
Not every egg that has pipped will get shrink-wrapped if you open the incubator before it hatches. It can happen but often doesn’t. I’d be willing to take that chance.
The other big problem with a staggered hatch is that the hatching chicks really mess up the other eggs, getting all kinds of nasty stuff on them. The risk from that is that the later eggs could get bacteria inside and the chick die, maybe the egg explodes. I really don’t think there will be enough time difference in them hatching for that to be an issue with your friends.
I’m not a proponent of staggered hatches unless you have a separate incubator to use only as a hatcher. But in this case, I’d go for it. I think it will work out.
