I am a 3d artist and can do rendering but I do 3d work and not 2d. For what you want it ranges from who you ask to do it. Each artist charge differently, some professional who has been doing it for years will charge you quite a bit 200+ while some will charge you 50-100. It mostly depend on who you ask.
Then you have 3D model/rendering which allow for more. The price of getting the full 3d model and set up ranges from 100-200+ depending on the details put into it. I enjoy the 3D modeling side of things because it allow me to customize it in many ways without having to re-draw the entire car. I can swap wheels I have already model anytime or change the color of the car on a fly. Hope that helps. I would 3d model your car with no charge since it would allow me to put it on my site but I am currently working on a few projects already. Here is one that I am working on now a Datsun 510
