That is a very small system so the most you would keg is 40 kegs.
While thats not a lot serving tanks are much nicer. Especially for the bartenders who wont be fliiping kegs during the friday night rush. I would consider a larger brewhouse as that system won't produce much beer per batch, remember that it takes no more time to brew 15Bbls as it does to brew 5. Is there a reason you are starting so small?