“So, if your coach is plugged into adequate shore power and your coach has basement heat tapes, then turning on the diesel burner may not be necessary for overnight temps only slightly below freezing.”
So, if your coach is plugged into adequate shore power, then why wouldn't the electric element in the Aquahot be turned on? That would provide some heating for the basement furnace and keep the Aquahot warm.
So, if your coach is plugged into adequate shore power, then the inverter should be on, keeping batteries charged up, and the inverter will also provide some heat for the basement.
And if the outside temperature is "only slightly below freezing," then not much heat is needed to keep interior pipes, etc., from freezing. The coach will absorb enough heat from the daytime temperatures - which would be well above freezing - to keep its interior from freezing.
Watch the daily high and low temperatures. It doesn't take much time from your busy day... maybe a minute or two. And if the temperatures start to dip well below freezing, then turn on the diesel burner and/or place auxiliary heating units in the interior... again, assuming your coach is plugged into adequate shore power.
If your coach is not plugged into adequate shore power, then winterize it!