I cleared off enough space on a desk in an "office" room in my house to have room for a PC dedicated to BI, and a keyboard, mouse, and monitor just for it.
While I may not sit at that position very often, when I do need to add a camera, adjust things, view recorded events, edit them, save stills or clips, etc., it is really handy to have a nice place dedicated to those tasks.
The biggest problem is avoiding stacking and storing crap on this handy horizontal surface so that I have to clean it off when I want to use that workstation.
I have two other PCs, three other monitors, three printers, a scanner, etc., in this area where I do programming, photo editing and printing, circuit board CAD, etc. And most of the networking stuff for our house is also in there, so it's "Nerd Central". Thus, the BI setup fits into the "theme" of the room.
I don't like the idea of putting any of the computers or networking equipment in any non-climate-controlled location, especially areas that get hot. But I also understand that everyone's house or office is different, so we all have to set things up to fit our situation.
But I have to say that I really like having a dedicated workstation for working with the security camera system.