To professionally install a camera system in NJ you need either a burglar alarm license or an electrical license. So you need to find either an alarm company or electrician.
Many electricians don't know enough about the different camera systems out there, just not their thing/primary focus so you get what you get.. Alarm companies will sell you the one system they make money on, typically a rebranded HikVision system.
Typically I recommend people stay away from the wifi/battery systems. yes they are cheaper to install and DIY but cameras are what I consider a "mission critical" item. If you have need for them, then you have need for them to work all the time. WiFi is not a mission critical platform and as long as WiFi operates in the unregulated frequencies spectrum it never will be.
Battery based systems have a single failure, human nature... "oh, gotta replace that battery soon...." 3..... months.... later...... "Oh crap, something happened, lets check the vid....CRAP!!!"
Then there's the issue of "affordable" camera systems getting constant false alarms from motion outside. Branches in the wind, shadows from the clouds, bird, insects, headlights...... you get so many false detections that you start ignoring them all together. Money wasted.
Higher end systems with good AI for detections that all but eliminate the false positives are not what most people consider "affordable" systems.
Then there's the issue of the affordable cloud based systems like ring and nest. I would NEVER put those systems in your house showing any part of your home interior. You don't control the data, video or sound, it belongs to Ring/Nest/Et el..... They're employees look at it, they freely give it over to law enforcement/govt agencies and sell the meta data. If you feel the need for interior cameras then you should have your own NVR system in your house that is secured from internet access.
And then there's the fun little tidbit that in NJ, video is not evidence in a court of law. You could have video of a guy breaking into your house, looking right into the camera with a big T-shirt on that says "Hi, my name is Steve Burglar!" while holding his drivers license up to the camera just before he steals all your stuff. Not permissible in court.
In order for the vid to be permissible as evidence you had to be recording it yourself as you witnessed, with your own eyes, the crime in progress...
the more you know......