I vaguely remember 9000lbs being the amount you need, or 3x as much weight as you need to start seeing the tractor scene when traveling back to the hotel.
It's genuinely a LOT of weight to get that ending, and you can't overdo it, so go wild :)
i've screwed it up twice now, and accidentally overwrote my save with the final week start call available, and my only remaining save is near the start of the game. Please help.
