Yeah, the wire would be heavier than the ship. That is a relatively fundamental result. With current materials, it's pretty much impossible to levitate anythin

Yeah, the wire would be heavier than the ship. That is a relatively fundamental result. With current materials, it's pretty much impossible to levitate anything against Earth's magnetic field. You can't put enough current through a wire to create a force bigger than its own gravity without using unreasonable amounts of power. Even if you put in that power, you'd melt the wire.