My coach came with no backup camera. That had to change . . . .
When researching (inexpensive) cameras I saw a lot from reviews of items that were failing - seems the LEDs for illumination would get hot and cause failure. OK for backing up but not ok for full time running.
I went with a Chinese non-illuminated color camera (Amazon) that imprinted "guide bars" into the video to give reference points for real world objects and a separate 15W LED floodlight from Northern Tool. Floodlight is controlled separately. So far haven't needed it.
Monitor was another Chinese something - 7" color.
The combo does the job but it's not as crisp as HD . . . . maybe because I used the handy 50 ohm cable and not a 75 ohm matched cable.
Good luck,
- c bob