Hard to say. Those tolerances would be expensive in general purpose machine work, but in engines those tolerances have been in place since at least the 1930s, and so economies of scale bring those costs down (ie, using specialized machines that are really good at boring precision holes and measuring them. The costs of those machines get amortized over every engine).

I'm sure a motor is cheaper than an engine (less steps to make), but they still require precision manufacturing, and all the other parts aside from the motor (driveshaft, axles, brakes, etc.) are more or less the same.

Plus, the cost of those other materials is going to increase if demand for EVs goes up.

evs could drive lithium but i really doubt they would influence copper that much, since it is used so much already

I think the more constraining commodities are things like rare earths[0] and other important metals like cobalt.

[0]: I know they aren't that rare, but they aren't mined/processed in many places and it takes a long time to bring a new mine online.

Somehow car manufacturers are able to make engines, transmissions, transaxles, and differentials really cheaply, so apparently all that precision manufacturing doesn't really cost all that much when producing at high volume. This should be equally true of EVs and combustion-engine cars.

Raw material costs might still be less than the manufacturing costs, but they're pretty hard to avoid. Also, materials that are cheap now might not be if demand grows faster than supply.