When I was a little kid , Dad's tractor was propane / butane . We had a tank that was probably at least 250 gallons . That tank served the house , also .
So , Dad had to never let the tractor run dry , because he had to drive it close enough to the big tank for the fill hose to reach . Dad said fuel was $.06 - $.08 a gallon at that time .
By the way , no worries about the fuel going old / stale .
Grandfather had a gasoline tractor & an elevated tank . Gravity flow to transfer gasoline to the tractor . You might look for that type of elevated tank to store diesel for your tractor ?
https://www.johnstonesupply.com/stor...ep?pID=B18-843
https://www.johnstonesupply.com/stor...relevance-desc
These seem to be designed to operate with start and or run capacitors . One would have to consult with the manufacturer to determine if they would work on a single phase submersible pump .
God bless
Wyr