Well, the only thing I can say is that I don't think that under normal circumstances a pup should be hypoglycemic from not eating during the night.
I am sure that is the measuring stick they are going by. You are thinking he should be fed 24 hours/day and that you can do that. Yes, you can, but it is not normal to have to feed a pup that often.
I see that you are going to pick him up. Hopefully things will go really well now for him!
Will look forward to updates.