As is my way, my post wasn't as clear as it could have been.
I'm not looking for 24x7 coverage. Should I hear a noise, see a parked/ slow moving car or have a suspicion, I want to be able to launch to observe/confirm.
The problem with stationary cameras is I have to hope "the bad guys" do what I don't want them to where the cameras are. Plus the cost of all those cameras (not to mention the effort to get them hung) is higher then I'd hope to spend.
I don't mind putting in time to learn to fly. But I don't believe this will become a hobby, so by easy to fly I mean that any flight skills I need to learn will be easy to retain (so 3 months from now I get the "flying tool" out, I can still use it).
I know of the flight time limitations of electric. I hoped that gas would provide longer flight times. Not true?
Very heavily wooded, so almost certainly out-of-sight flying abilities is a must.
I'll Google the blimp idea (slow and quiet would be pluses)
Video would be optimal, but stills would work too.
Appreciate the responses, the debate and alternate suggestions.