You mean running hot water from a HW tank? Of course. I have many things at home not on the boat when we’re away from the dock. Such as A/C power, I not having a generator. We must remember the context here. “Priority” outfitting for sea an old boat, 40 yr, on a budget. The Bavaria, and my Pearson 30 before it, have/had hot water. Kind of unusual in the case of the Pearson. One pair of cruising friends owned a Ranger 33 w/o HW that they visited frequently for overnight stays away from the residence town on harbor plus to the islands. Hanked-on headsails. No fancy electronics, no radar, no windlass. They were a bit desirous of HW, but not enough so to install the tank and tubing, etc. Yet, the boat was well outfitted with gear and other creature-comforts. The OP’s target boat has at least a place for the HWT, so why not? Because, as I said, you don’t need no HWT to ready for sea. Spend money first on what you do need. At some point I think one will start questioning the need for one if it competes with another upgrade, etc.