I'd avoid pre-made cables simply because you're going to have nightmares routing them. Instead of drilling a small hole of maybe 6-7mm, you're going to be drilling a hole at least 20mm and probably larger. Add into that if routing through walls etc, the plug is going to get stuck everywhere and probably damaged or strained along the way, and you have a recipe for disaster for the cables, maybe water ingress to your home as you're going to be left with huge holes to fill around what is a small cable once the plug is pulled through, and whole load of other problems.
Keep it simple. Buy bulk cable. Cat 5e
crimping tools can be found on Amazon for less than $15. Cable strippers designed for poe for around $2-3.
Cat5e plugs cost a few cents each as do the boots to fit over them and they can be bought in bags of varying sizes. Cable testers are cheap or buy a good one depending on your means eg Klein are higher end. Alternatively as mentioned above, some vendors are selling complete install kits of cable testers, crimper,stripping tool and plugs and boots for around $40. (always read the reviews and make sure there are ideally a lot to avoid review cheating).
BTW 5e cables are easier to terminate than Cat 6 and Cat 6e tools are more expensive. Where as I don't want to go against the grain here, I agree with techTech, Cat 5e is probably more than enough. I struggled to decide between the two for a while as I hate putting stuff in that's not the latest spec, but he's right, how much bandwidth do you need domestically? If each camera currently uses 10mbs and you have 20 cameras (quite extreme for home use) that's 200mb bandwidth required. Even if the next gen cameras become say 25mp (ie ex 4K's number of pixels - highly unlikely) and run 30 mbs even more unlikely due to compression, that's still only 600mbs over 20 cameras and well within the capabilities of Cat 5e. I predict by the time we need over 1Gbs we'll have virtual 3d cameras along with plasma cannons to defend our homes. Seriously though, unless you plan a huge install of 30+ cameras, it's unlikely you'll need more bandwidth in the forseeable future. Cat 5e is harder to work with, harder to terminate and all the tools cost a lot more. The choice is your though. Many do choose Cat 6 for peace of mind. Just be aware it will make the job harder and more costly and the tool cost is higher.