I assumed based on his first post that he was doing more than a few jars. Water baths work if there are no labels on them. He can dump the 5 gal buckets into his heated bottling tank and only do what he has orders for.
At the time I posted I did not catch it was a jacket tank
.... at the time you posted you had no idea because it said.."
and also have a 16 gallon Maxant tank."
States nothing of a water jacket in the opening post but maybe that is all Maxant makes in a 16 gal I did not look it up and have no idea.
With that said it looks like a no- brainier.... 5 gal buckets and heat in the jacketed tank...