[elhigh]

One thought:

If you're using this rig's hauling capacity mostly for schlepping in your drinking water, consider adding a rainwater harvesting system to supply your laundry and toilet flushing needs, and create a separate water circuit for those.

NOTE: hot water concerns. I don't have them since I never use hot water in the laundry, but you do you.

Eliminating some of those loaded runs couldn't be a bad thing.

And finally, consider getting a little ecobeater for when you aren't towing thousands of pounds of water. Getting decent mileage in a big bruiser is nice, but you can get decent mileage in a little scootabout too, and that's before you make any mods to make it even thriftier.