The trouble unless you're tooled up for it, 1 tonne bags are near impossible to move, and double in price to have delivered, where they are still impossible for you to move except incrementally.

Interestingly the 1.5 tonne tray capacity on the Cybertruck would be appealing for exactly that reason - you'd actually have a vehicle which can actually carry that (ute I borrowed from my inlaws caps out at 750kgs).