FYI don't know if it's what you're looking for, or not, but have seen an 8-10 camera security set up at Sam's.
IMHO if it doesn't have an alert built in, it's pretty much useless. It means you have to be watching the camera's when a perp walks by/in/on. If it does have an alert built in, great.
I don't know much about those things, so take it for what it's worth.
A good dog, will work much better. Some pure breeds might work better that have a history of being a guard dog, but a mut can work just as well. Especially with a fenced in yard. If you've got a couple hundred acres, you can still fence in, like an acre, and maintain that, with a dog. If you have a lot in town, the same goes. Doing that, you've just created two hurtles the perp has to cross before he gets to your front door. And never think a magnetic/electric contact works on windows. 1) keep them locked 2) they brake and don't need to be opened.
A good dog will not only alert you, but just his presence will go a long way in keeping the perpetrator away from your place. And if they shoot the dog, you'll know ahead of time, there is a violent offender coming your way, prepare accordingly.
Just some thoughts.