I believe that currently, SpaceX only has two landing barges - one in the Atlantic (Of Course I Still Love You (OCISLY)), and one barge in the Pacific (Just Read The Instructions (JRTI)). How long would it realistically take to cycle a barge from having a rocket landing on it, returning to port, offloading the rocket, and deploying it back to the landing zone ready for another ocean landing? 

Obviously part of the cycle time is how far downrange the landing zones are, but although a return to land scenario is going to provide a faster cycle time, I am guessing that there will still be launches that require an ocean landing for various reasons. Just wondering if there are announced plans for multiple landing barges to provide redundancy or additional landing ocean landing capacity?