ArmedRN

This is for home. So I went and found the system in the garage and this is what I have, one dvr, 16 camera's, 16 cables with power supplies and 4 power supplies.

I'm installing a DVR system with 16 camera's but I can't figure out how to get all the wiring through the exterior wall cleanly. I have set up small 4 cam systems before and just run it into the attic and then down but I don't have an attic in this house and will need to bring it in though the exterior wall. I don't want to cut a 6" hole in my wall to run the cables and power through but can't seem to find any box that is made for this purpose. How do the pro's do it?