Get POE cameras. Have fun pulling cat5.
I just installed a ubiquiti unifi system at my farm building. I am very happy with it. It will require someone with some techie skills to set it up. I had previously bought a more expensive system from Lorax that I returned due to them sending me a used NVR... Lorax has HORRIBLE customer service. I would not buy ANY lorax system regardless of how good or what any review states. They are a HORRIBLE company to deal with. I cannot stress that enough
Anyways here are the components I have:
Unifi NVR
Unifi Micro camera (it's about the size of golf ball cut in half)
Unifi UVC 720P camera
^^I opted for the 720P over the more expensive UVC-Pro camera for about 1/3 the price.
I have the micro camera inside and within the same room as my wireless access point. night vision is pretty decent with it. the UVC cameras have acceptable to pretty good resolution in daylight. if night vision is of concern make sure you have exterior lights. In an outdoor environment the UVC cameras aren't all that good in complete darkness. I have one installed without a light around and you can see when vehicles drive by, but not really make out much detail. I have another installed with a wall pack light in proximity and it's acceptable in terms of what you can see.
The UVC-Pro cameras are a much more substantial camera... optical zoom, 1080p, built in heater for colder temps, and I would guess they have better infrared system for night vision.
to be fair, my UVC cameras are mounted about 17' up in the air. A lower mounting position would likely offer a little better night vision with the infrared based on what I see with the micro camera inside.
I will note that I am DIY type of tech guy. I can build computers, setup routers and bridges and what not, and I could not set this system up. Once setup I am can easily add more cameras and change settings very easily, but initial setup was out of my league.
I read tons of reviews of different systems and all have good and bad reviews out there. this system met my budget and I am overall happy with it. You definitely want to buy the Unifi NVR if you decide to go with this system. I have read people have LOTs of negative things to say about it trying to use the cameras without it.
and to note the system uses POE and comes with the adapters for their UVC and UVC-Pro cameras. the micro camera has a standard power plug in, no batteries and connects to the system wirelessly