It is nice to have a car and since you'll be staying at the Residence Inn during your training, you can use it to get some supplies...this serves two purposes: saves a lot time (that you can't afford to waste) trying to find dinner every night, and saves money, since you will have likely have left a good job, and will be on some meager per diem and pay during your training.

It is also nice to have the car since you can escape for a few hours during weekends (or other days off)...or you are likely to get cabin fever.