So. Used the camera a little more today. And I will probably try a different one at some point. But what I have currently is better than no camera at all.
This is the camera I currently have:
Accele TLP100IRBL License plate frame backup cam with active parking lines
https://www.amazon.com/dp/B07CSF7KD1..._aB-TBbD711C12
The line width is determined by the camera but seems to closely approximate the width of the car. The large, dotted, multicolored lines are static. There are thin red lines that turn when you turn the wheel, you can see them in the photo in my prior post.
However, the thin red lines do not seem to approximate the turn of the wheel accurately.
The camera can be tilted up or down, which helps with it being mounted so low.
I haven't tried driving far in reverse using the camera. I only really need it for backing out of parking spaces and my short driveway.
I may try a more basic camera. I'd like to fix the image offset on the iDrive screen that I mentioned above. And, while I like lines that turn with the wheel, I'd rather have static lines only than turning lines that are inaccurate.
*Edit* — the larger lines also turn with the camera I have but again do not approximate the turn of the wheel particularly well.