Myself, I like "cross washes". Basically, two cameras in front and two in the back covering a wide angle view of all entry points, paths of entry, and yards. One in each corner. This would be a basic and minimum setup.
I would then add cameras to provide closer in shots to help with identification.
In your case, I like the shot you put in today. Good shot of the vehicle, approach, and ability to ID a person. I'd put another one from the opposite side or a tighter shop mounted higher. For your backyard, one up high to catch the ground level window and door with a tight zoom and an additional one to catch the ID of someone on your deck (although the cam on that corner might work fine depending upon lens and FOV).
After all of that, I would add some bullets mount high at the peaks of your home with a wide angle and pointed down to catch anyone walking around back. This is not a big deal (unless you have ground level windows there as well) but it might be useful in the future when you have some more disposable income.
A side note on the camera that you took the screen shot of today. You have your neighbors entire house and yard in the shot. Depending upon the jurisdiction, if they found out that you were recording their comings and goings you might have a legal issue. I try and keep private property out of my shots for that reason. Just some advice, but try and keep everything low profile.
Hope this helps!!
