I just put this on my son's truck - all in like $100.

https://www.amazon.com/dp/B08H1WZSK9?ref=ppx_pop_mob_ap_share

Need this too:

https://www.amazon.com/dp/B07TQLHYJ2?ref=ppx_pop_mob_ap_share

Quick connect to the reverse lights so the camera only turns on when backing up.