To the real estate editor: If you take care of the plumbing the rest of the house will stay safe. However, do not leave any water in breakable bottles or glasses because if the water freezes, it expands and breaks the glass.
Fruit jars inside cupboards keep satisfactorily if there is some syrup because the freezing point is [lower] than plain water.
There is considerable work to get water back into the pipes and water tank on your return, but with the present price of fuel for heat, this method saves money. Mrs. W. K. Moll Pocatello, Idaho