We're a 30-40 strong architectural office, with the (very) typical variety of workstations and monitors - and in our gearing up for ISO14001 status, I want to kickstart some intiatives.

First off, print auditing (for which I'll be testing PaperCut free soon) - but only because I think most of the prints we run are a sideaffect of not having our (assorted makes & models of) monitors calibrated in anyway, to our printers, or to our software.

So I've been talking with my boss and he's keen to give it a go - concious that there's time (and money) to be saved here... but, knowing what I want to do is one thing, how is another...

Would something like ONE OF THESE suit our (basic) purpose to find some kind of parity between each computer's visual outputs?

BTW : I'm not talking high-end graphics office workstations with Eizo monitors here (a mixture of Dell,Neovo & Acer; tft/lcd/led/ips,etc)

One of those will be fine - if you're planning on buying one for each machine and keeping it attached, which is how they're designed to work.
It sounds like you've got a real mix of panels, all of which will have their own slightly different colour temperatures and so forth.
If you're serious about calibration between every work station and the printers, then unfortunately I don't think there's necessarily a cheap way to do it - unless printing a colour gamut chart on the printer, then just visually matching that to the display of the machine sent it would be satisfactory?

Wah? One per machine? It's not a device you move around? Err, didn't think that'd be the case...

A consequence of hand-to-mouth IT acquisition sadly - but thankfully most of them are matte!

I guess this my whole point though, I don't live to write ROIs but if I can put one together that says we're spend X hours a week moving colours/shades back and forth in our graphical work as it gets moved around different workstations, then X on test prints, then maybe that expense would be worth it. But (perhaps not so obviously) we're no that serious to fork out new money on a brand new super-duper monitors for everyone.

Maybe just the visual "artists".