I set up my x3 camera system and yes take your time setting it up. I left about an extra 30 ft of cable per camera as I move them around the barn depending on the season. Cable is cheap and so for the extra footage you can be pretty versatile. I found you need to position the camera reasonably close. Keep the cables as high as possible as we found that our kids are great climbers and I am sure would tug on the cables. The other issue just to be aware of is when you are using red heat lamps as this does impact on the picture quality. In effect its bright in a localised area.
I view my cameras on an Ipad - there is a great app called TapCMSHD.
I watch the goats from my bed at 3am in the morning - it is amazing to see them feeding at the hay racks in the pitch dark.