Can you give me some idea of the availability and the cost of the electric car motors?
Hi, Don - The most available electric car motor is the series wound DC motor.
There are a couple of companies that make them particularly for electric cars; I just saw the ADC 9" motor a lot of people use listed for 1750 USD, and NetGain sells the WarP 9" for about the same through their dealers.
You can also find a suitable series wound DC motor in a used electric forklift; you'll have to make some minor adjustments on it to go into a car, but these are fine.
Another possibility is the 3-phase AC electric car motor, which is listed for 2,600 USD and is available through a few dealers like Electro Automotive and Metric Mind.