Just bought 32 foot travel trailer and am in need of a backup camera for it.   I would like to use 3 cameras. One on the back looking straight back and one on each side about halfway down the trailer looking back.

I need as close to realtime video that I can get

I found a way to do one camera very easy. The transmitter broadcasts its own wifi network and you can connect to it with an iPad and use that as a screen.

Camera

Transmitter

The issue is that I can't find a way to make 3 of them display on one screen. ( please let me know if there is)


So the easiest option that I can come up with is a camera dvr\hub hooked up to a wifi network in the trailer. Then hook the iPad up to the network and use that to view the cameras.

My question is does anyone have a better idea or any recommendations on affordable components.

I like the cameras I linked due to their size. ( windload and vibration are a large concern). I have started looking into a 4 camera system. 720p would be nice. I would also like to keep everything 12v input volatage. I could use running lights to power everything. If 12v isn't an option I would have to install an inverter

On the cameras, they make and I have bought similar small cameras that are meant for side of vehicle/to rear viewing. Made for RV''s and buses. I bought mine on an auction site. Comes in a compact housing for just camera looking down the vehicle.

Check out these more expensive solutions that have monitors for multi view: http://hanscomk.com/products/monitors

Not sure what your budget is, but I found this https://www.tadibrothers.com/category/backup-camera-systems-with-3-5-rear-view-cameras after a quick search.  I have no experience with this company or products, but it looks like exactly what you are looking for.

If anything, maybe it will provide some additional inspiration for a different approach to solving your problem.

Mike