Note that the even the most expensive one only takes and stores pictures and videos.....at least I see nothing about "live" transmission of video. I have found that this feature is referred to as First Person View (FPV)
And I'd assume you are flying "blind" and would need to have it in sight to direct it's flight with any accuracy.
Without live video, it has little "tactical" value in your neighborhood. By the time it returns and the pictures are viewed on another device, what ever was about to happen, will have started at least.
It is still great for spying or peeping-toming
If I am mistaken about the live video and blind flying, let me know...I am assuming if FPV is not expressly mentioned in the blurb, it isn't a feature of the model.