Your budget will dictate the final out put of what you see, and review . . . If you're seeking face recognition plan on spending upwards of $800-2500 per camera.
If you simply want to see basic things, camera's can range from $89.00 - and up for a good valued priced / performance camera . . .
If you intend to wire your house wire it using CAT5e cabling, or CAT6 to future proof your investment . . . I always run both coax, power, and CAT cabling to ensure backwards compatibility to my installs . . .
The DVR you select will play a very big role as to how you perceive the final out put or recorded image . . . There are IPS, FPS, etc along with FOV aspects that need to be taken into account . . .
No matter what gear you decide to purchase, get up on a ladder and pretend you're the camera . . .
All the best gear in the world wont capture or help you see what you intend to see if proper and common sense installation is not applied . . .
If you're looking for the best bang per dollar, save up and purchase a PTZ camera, so as you're able to pan, tilt, zoom multiple area's with just one camera . . .
I have done this to ensure I can see 360', and 180' of the perimeter which I deem important to watch and protect . . .
Keep in mind many camera DVR's can be programmed to sound off, and alert you in many ways to motion . . . Mine are set up to do the following:
Motion is detected in the *free zone* it simply records. Motion is detected in the *out of bounds* zone, picture is taken, e-mail sent, DVR sounds off audible alert - message is sent to 24hr supervised station for processing . . .
PTZ camera's: I have them set for *touring mode* this allows me to sweep, pan, tilt, and zoom based on 32 presets or tours of vantage point I wish to capture during my leave.
This allows the user to see and record greater events as they occur . . . When you're using PTZ camera's its important to note that again proper placement is critical! Just because the camera can pan tilt and zoom 360' 180' doesn't mean jack **** if its view is only of the sky or some random alley . . .
Best Regards
Teken . . .