what is the most cost effective way to install cctv cameras...

i need to fit 8 cameras...4 on building 1 and 4 on building 2.

is this the best choice....?

dvr 16 channel

run cat 5 cable and fit baluns at either end...from one building to the next...then in the building use rg59 cables with power

fit 1 power supply in building 1 and the other in building 2 to power the cameras from a central point

0 or 2 lux cameras

480 or 560

distance approx 30 metres

do you think using the movement facility is advisable to activate a buzzing or will it drive me nuts all nights with tree movement etc...or is it better just to fit point to point sensors