There are no laws that restrict the amount of cash you may carry across state lines.
Be careful. Have you considered doing a wire transfer so you can't get held up with a lot of cash in your pockets? Such a wire transfer is easy to arrange with a local bank.
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No problem if the money is from a legal source but be careful about speeding on I-95, the cops do a lot of stops looking for drugs coming up from Florida and might impound money if they have a chance to!