@dharmilstar,
I am not sure of the support that you may need. I installed my CCTV setup about 2 years back and it has been that way since. I can give you a cost break up:
CCTV DVR: 5k/- Approx. (Supports 4 cams)
HD Cams: 5k-10k/ Per Cam. So a DVR supports 4 cams. So that way 20k-50k.
HD for...