I have a client that wants to show different textures on a model I made. These will be 30 second turntable animations. They render at about a half hour per animation. I just swap the texture on each one. I do not need the computer for other tasks during render. There will be about 5 to 10 minutes of post processing/editing after render.

I already charged for the modeling but how much should I charge for each animation?

thanks