I run Blue Iris on an older Core2 Quad based computer and have my NAS set up as the archive location. Having it set to archive daily limits the amount of hard drive space I need to the PC, which is 320GB and plenty for my 5 cameras. This allows me to use ONVIF and other cameras without their own (often paid) remote viewing and storage system. Of course, having the recorded data on the same premise as the cameras does leave open the possibility of the recordings being stolen during a break-in, but that would also be true for anything resident on a NAS..
I do still use V4 of Blue Iris. V5 recommends a faster computer, rhough the camera resolution and count is the main driving factor.
