I strongly suggest that you look for one with the back-up camera. The rear visibility in the Volt is poor, but the camera goes a long way toward correcting that. (Unfortunately, the camera only operates when the car is in reverse.) It was offered as an option to the base model, so you will find a few base models with it. (It is standard on all Gen 2 Volts.) Search on Carvana's web site to get an idea of the cost and availability of the various options. I have a base 2014 with the Safety Package 1 (camera, rear backup sensors, and auto dimming mirror), and I'm quite pleased with it.
If you live in warm climate, I also suggest you look for a car with a white or light colored paint job. Your car will stay cooler and put less stress on the AC.
I hope you can charge at your new workplace. Even with level 1 charging for those 8 hrs, you should make it home without burning gas.