Is it possible that two small electric motors would be less expensive - or the same price - as one large electric motor?
In other words could BlueStar be AWD by default because two 120hp equivalent motors are the same price as a single 240 hp equivalent motor?
You would never think this way about a conventional car but I wonder how things change when we're talking electric.
The motor cost is probably related more to production numbers than size, at this point in time. But once production is sufficiently high for a given motor, in all probability it's cheaper with one big motor than two smaller motors.
So, it probably cheaper to buy 20,000 motors with 100 kW than 19,400 motors with 100 kW and 300 motors with 200 kW. But cheaper still to buy 10,000 motors with 200 kW than 20,000 motors with 100 kW.
Development costs for a 100 kW and 200 kW motor will be largely the same. Production time will be largely the same. Administration, shipping, etc will be largely the same. The biggest difference is material costs, and material cost simply isn't that big a part of the total cost.
In large scale production, the production cost might be something like $5000 for a 100 kW motor and $7500 for a 200 kW motor. The bigger motor has a lower cost per kW.
How this relates to Tesla depends on the market conditions. It's possible that it's cheaper with multiple indentical motors, but it's also possible that different sized motors are cheaper.