It's not unusual to describe a heavy object in tonnage.
But no one has any idea how much a ton is, really. Is 250 tons a lot? How much?
250 tons is 500,000 pounds. About the weight of 8 houses. Or the weight of 100,000 bricks.
Which is a solid stack of bricks 10 x 10 by 1,000 bricks high.
It would take you more than 2 months, working 24 hours a day, a brick a minute, to unload that many bricks.
Facts are facts, but images resonate.