It is a tall order to get a standalone navigation unit with backup camera for $100.
I would think swapping out the headunit to one that is setup for a backup camera and just buying a mount for your phone to use it as navigation would be the cheapest way. I'm sure you can get an OEM nissan headunit and backup cam for $100. My girls old 2012 altima had a headunit for that and I think Nissan uses that same one still. So it's been out for years and they are probably all over ebay.
But as you said you want a standalone. Magellan and garmin both have navs and wireless backup cameras. The navs accept video in. But I'm seeing the camera's themselves for about $150, then money for equipment to hook them up and the nav units a couple of hundred. Basically what I saw was about $500 for what you want to do. I know it can be found for cheaper but nothing I found was close to $100 all said and done.
Goodluck and hope people know of a product that fits your criteria. Post up your solution if you find one on your own. I'm curious as to what you come up with.
I would think swapping out the headunit to one that is setup for a backup camera and just buying a mount for your phone to use it as navigation would be the cheapest way. I'm sure you can get an OEM nissan headunit and backup cam for $100. My girls old 2012 altima had a headunit for that and I think Nissan uses that same one still. So it's been out for years and they are probably all over ebay.
But as you said you want a standalone. Magellan and garmin both have navs and wireless backup cameras. The navs accept video in. But I'm seeing the camera's themselves for about $150, then money for equipment to hook them up and the nav units a couple of hundred. Basically what I saw was about $500 for what you want to do. I know it can be found for cheaper but nothing I found was close to $100 all said and done.
Goodluck and hope people know of a product that fits your criteria. Post up your solution if you find one on your own. I'm curious as to what you come up with.