Our last foray into this topic was in 2014, and since then technology has increased exponentially while costs have dropped in unison. We will walk you through our current surveillance system that was used as a security feature while our home was vacant and under construction, to the final form that can keep an eye on our little one over 95% of our property. We will touch on our recording solution, wiring, and cameras. 
This is our fourth Qnap NAS, third for home and one for our office. We wanted an all in one powerhouse that can backup our computers, host our media on Blu-Ray/UHD, and run our surveillance system. For this task we chose a Qnap TVS-673e, a 6 bay 3.5 inch enclosure, dual SSD cache capability, and quad core processor. This is paired with a 24 port UniFi power over Ethernet switch, which will make powering and connecting our cameras a one wire hookup.
As of this writing, we have a 36 terabyte array of six 6TB hard drives, and 1TB of network cache via two 500GB SSD drives. Our NAS supports hot swapping storage drives, and it is a tool-less operation to mount them in the carriage.
Our cache drives were a little more involved, but the case dissembled easily for this upgrade. It was highly recommended to install heat sinks in this application, and they just barely fit. While a little pricey, this helps read/write speeds immensely when recording 12 4K camera streams and streaming UHD content to our 75″ display.
One of 9 exterior cameras. We used a combination of dome and bullet cameras from Amcrest. All of our cameras are 4K resolution, and power over Ethernet. Compared to our previous project which required a video cable and 12 volt power, this installation uses just an Ethernet cable for both. It is really slick to work with, and simplifies planning and installation.
The above camera as viewed from the cell app during the day.
And again at night. All of our cameras have adequate infrared light sources built in, and they can also be augmented with stand alone units.
Once the budget for cameras was ready, they arrived quickly.
The “work.” Eric estimated 10 devices with this layout of Cat 6 cabling. The idea was to set up the pull from the longest run, and work backwards toward the server cabinet. In theory, all of the cables should be where they need to be.
Getting ready to load into the attic.
The longest runs were coiled in their respective locations, ready to be deployed outward for exterior cameras.
It will be no surprise that additional runs were needed as the scope of the project grew. 
The exterior of the house was mapped out, and camera locations committed. The next step was to pull wiring from inside the attic out. We used a fish stick to run into the attic about 10 feet, and tied the Cat 6 in the attic. It was as simple as massaging the wire out. And running into the attic a dozen or so time when snags were encountered.
Another run pulled.
A few corners of the house had two pulls for cameras overlapping coverage around the lot.
Junction boxes were used to protect the Ethernet plugs from the camera to server.
These two cameras needed to be just far enough apart that they needed individual J boxes.
Our re-roof project required all exterior cameras on the fascia be removed. Once the new fascia was painted, we opted to color match the cameras as well. Lenses masked and ready to be sprayed with the same paint we used for our metal garage door. They needed a thorough cleaning prior to paint.
Looking good!
The initial installation, prior to repainting the house.
Freshly painted and remounted. They blend into the house extremely well now.
After locations were determined, final aiming was done. Another project in the books!
This system adds great peace of mind, whether we are home or away. It is especially useful now that the yard is fully fenced, we can keep track of our little one of he jets out of the house before we can even get up from our desk!