Hi!
Oleg Sergeev! i wish i could use all the option i listed but then it will become 10 year project for me, as many thing in list could not be implemented simply and cheaply.
Andy Neil! Yes, I think i should specify some more information about the project. I have to make a simple Monitoring and Detection system to detect that if any person or animal or vehicle etc is transpassing through some certain area. Consider it like jail or perison camp or some thing required in old cowboy movie to keep an eye on the borders of farm. Actually in my case i have to make it for the protection of warehouse which covers huge area and around it is a wide empty places as it is out of city and owner is not satisfied by simple fences. Totally i think i have to cover area of more then 20km.

Thanks!