I don't have much advice because I am terrible at potty training but a young pup is not going to hold it for 5 hours (maybe not even 2 hours). If you leave him in a crate he will "go". Then he will think it is okay to go in there which won't come in handy later. I also think a dog needs access to water 24/7 or atleast 16/7 (just pick it up while you sleep).
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