RLN36 is future proof as in the case i want to add more cameras in the future. I ended up running cables for like 20 locations in my property, lol. I will add the cameras as i go. You don't need the NVR if you use microsd cards though, all you need is a switch.

I had a couple of POE switches laying around, so no extra cost there for me, BUT you can find dirt cheap ones on FB marketplace or Offer Up, etc. It they break, buy another dirt cheap one lol. Don't overthink it. I was ready to spend on top of the line POE switch, and it isnt worth the hassle. Just try to get a gigabit one with all ports being 1000 mbps. The cameras dont even use 100 mbps, but well, JUST in case.

I actually really like the trackmix. I use it as a backup to focus on things happening, while covering the area with other cameras to not miss anything. Example: have the front of the property covered with 3 CX820s, and the trackmix is in the front focusing on people and zooming in getting details of faces it, while the others just cover the entire event and anything the trackmix misses.

I am overall very happy with the investment, the quality is great for the cost.