Never gave it much thought. Up her in the frozen north, the ground freezes and the truck weight would only be a concern in early spring of if it was really wet for the fall delivery.

I would probably be more concerned about a septic tank truck then a Propane tank as far as weight is concerned.

Moving the Propane tank could be an option, but will it work as well if its too far from the furnace? Do you really want the 500 gallon propane tank closer to the road?