Being that you are in the tech industry and not on a tight budget, if I were you I would look into a NAS system by Synology.
https://www.synology.com/en-us/surveillance/7.0/overview
On the opposite end, Costco has a Q-See HD 1080p 2TB 6 camera package on sale this month for $499.
http://www.costco.com/.product.100153934.html?cm_sp=RichRelevance-_-categorypageHorizontalTop-_-MoversAndShakersInCategory&cm_vc=categorypageHorizontalTop|MoversAndShakersInCategory