Which single board computer to choose for hd camera + gpio?

Question

Arduino

There is an arduino and a separate ip camera - it turns out they occupy 2 ports in the router = expensive.
Need to broadcast a good quality video stream and control servomotors, what would you recommend?
I think orange because of the price, what would be the advantage of raspberries? if they exist at all.
Why do people buy a raspberry camera module for 2k when you can use a good quality usb webcam for 500r?
Maybe someone knows a cheaper board with a media processor and gpio outputs?
I apologize in advance for the noobness and annoying repetitive questions ....
PS: I forgot to add I use only ethrnet, stable speed is critical
and preferably ease of programming like on arduino

Answer 1

Why do they buy?) ... to fasten their hands to one place. Not the butt. There is nowhere cheaper. When it comes to pay)

Answer 2

Cheap cameras may simply not start on Linux (I'm not talking about the ARM version).
I did not notice any fundamental differences in the performance of orange and raspberry. But I used the garbage dump under Media.