Hello all. I am looking for a new IP camera system for my home. My budget is around 500. I have a group of individuals stalking me at home and work with use of drones and other electronic harassing devices. I have a two story home and bedroom is upstairs. This group has drilled holes into my windows sils and are using drones to pump gases and other things in on me daily. I have a 75 foot tower that I want to put 4 cameras on hoping to cover my house. From cam to ground is 75ft. I have some analog 3mp cam. Should I go with Bl and cams or a NVR and cams. Installation isnt an issue. I can pull the IP cable. I need to capture some footage so maybe the locals will do there job. Thanks in advance