The issue with choosing a DVR and optic for most folks is their head is not thinking outside the box for what ever reason. If that box is located between your Gluteus Maximus, no sense reading any further. If you like to tinker with gadgets, wrench on cars, read on......
I enjoy hunting hogs and have been hunting for quite some time with a certain crew that rolls with high dollar custom 308 AR's, 20 round mags, thermal/ /NV Monoculars, optics, of various shapes and sizes, typically the bigger-the-better, bipods, lasers, torches, quad rails, BUIS, etc. plus other assorted eye candy. Their rifles are without question accurate, reliable, and, most importantly to them, looks cool to TWAT Magazine fanboys and anyone else that's never burned dump trucks of brass on uncle sugars nickel.
Our hunts are all night affairs usually from last light to sunup., occasionally hunting in blinds but more often than not, hoofing it to make the rounds at the feeders and holing up in a hide if there's hogs. Hunting hogs is a an absolute blast when you're on the trigger. But more often than not, it a waiting game. And the sitting, scouting, walking, waiting, the tension and anticipation, it's a lot of work. 5-6 hours into the hunt, their heavy rifles wears their middle aged azzez out.
Thinking outside the box..... if we could scout our spots in the comfort of a Lazy Boy ,our hunts would be. perfect. No wasted effort, more hogs in the freezer, and less chance one of us will drop dead from a heart attack. Our crew being primarily IT security geeks, .gov spooks, and lazy by nature, we chewed on the problem.
Wireless cameras at each feeder, on game trails, and the spots we hunt.
Cameras were modded to increase IR sensitivity and include a built in 5.8 gigahertz transmitter. Runs 3 days on a couple of 3.7v 18650 LIon cells. Each camera is programmed to send a txt alert when it detects the motion of an object that meets certain parameters of size & shape. Range is 4 miles. The entire package would easily fit in a cigarette pack. Cost = $30 each.
Receivers are the size of a box of matches. Run time on a single 3.7v 18650 cell is 2 days. Video is outputted to a reapeater that aggregates the video feeds to an open source app the aggregates the camera alerts to a monitor accessible to our cell phones via an access point. Cost= $22 each
Repeater....homebrewed.....old linksys AP with a YAGI directional ant running a DDWRT distro Cost = $0
Supplemental IR light at each cam = $6 each
A micro DVR could be added to each cam for $18 plus the SD card and the time to wire it to the cam.
I prefer a 600w transmmitter but 200mW works well for shorter ranges. We've gotten up to 1.5-2 miles LOS at 5v with this product.https://www.amazon.com/Wolfwhoop-600TVL-...transmitter+5.8
A cheap and tiny 600w transmitter thats the size of a small matchbox. 2x 18650's 3800mah will run it 2 days.https://www.amazon.com/AKK-TS5828L-600MW...transmitter+5.8
$18 will get this bad boy. Cam and transmitter, low current draw, it'll run a lot longer than you can stay awake to hunt. https://www.amazon.com/GOQOTOMO-GT02-5-8...transmitter+5.8