At high enough volumes, cost becomes the cost of the raw materials. NiTi wires are obviously made of Ni and Ti, both of which are ~3x the cost of copper. If

At high enough volumes, cost becomes the cost of the raw materials. NiTi wires are obviously made of Ni and Ti, both of which are ~3x the cost of copper. If you can design the wire to require 3x less material than the motor approach, it will win.