Blue iris good thing is that it doesn't charge you per camera, as synology or Nx Witness, on a 30+ setup it could be a factor.

Only downside is that Blue Iris server only runs on Windows. Leave you a video in case you are interested, IPcam: Nx Witness full install demo on cheap/low-power NVR hardwareģrd suggestion is Blue Iris, but for 30+ camara setup, is going to require a good CPU, and tweaking on the settings of BI to handle that amount of cameras, i would probably go with 10900K as BI does use the intel iGPU on it, it can also use Nvidia GPUs, but i feel it more efficient with only intel cpu/igpu. Its a very easy to use software that runs on server side runs on Windows and Linux, client side runs on any platform, windows, linux, mac, andriod, ios, etc. My personal suggestion is Nx Witness, I run 10x 4MP on a my server with Celeron J5005 without any issues, i would go higher CPU on a 30+ camera setup, an i5/7 should be enough to handle it. You can use any of their servers, but for 30+ setup i would recommend you look into their DVA line that are meant more for surveillance and AI. I agree with dextomitor, Synology might be the closest one step solution sub.

Athome camera alternatives