Re: Efficiency savings?
"the cheapest way to get a remote terminal for your central system is by getting a tablet, laptop or even a PC"
Really?
The software to turn a Raspberry Pi into a DIY multifunction thin client has existed for a while, and inevitably there are commercialised versions, e.g. around a couple of months back Citrix announced a $89 Pi3-based thin client, which was even covered here:
http://www.theregister.co.uk/2016/05/24/citrix_bakes_up_raspberry_pi_client/
Have a look, feel free to report back (either here, your workplace, or both).