I have a client that is a repo man and he would like to add cameras to his trucks to cover the entire perimeter around the vehicles. His hope is to have recorded evidence to support his workers when they are confronted by people losing their cars to the bank. Obviously this is a dangerous job and he hopes it will help his employees in cases of he said she said. Or, in a worst case scenario, give him cause for termination of an employee if they don't act accordingly.
Another reason is to document that a given vehicles condition can be documented in case of a damage claim. They may be able to prove that damage was preexisting with video.
Technically, he would like to record to a removable medium, such as an SD card or flash drive. He would only pull the data upon incidents, so long retention isn't needed. Probably just a 24-48 hour retention period would work for him.
He doesn't need GPS or streaming, just recording video alone.
He would also like low light ability, either by super low light capabilities or IR integration. Most of their work is done at night.
I am looking for a reliable, mid level system that I can offer him. Not interested in Alibaba/eBay level gear, nor an expensive, cost prohibitive exotic system either.