What does "bit the dust" mean? Does it mean the multivalve is broken, or the laterals inside? Or does it mean the basic tank is irreparably damaged?

If it's the laterals, you'll need a new set and 300# of sand.

If it's the multivalve (assuming it's not fixable), you'll need that.

If it's the tank itself, you are probably right and a new one is in order.

Carl