Controlling temp at several sites, all residential homes

Hello -

I would very much appreciate any help you could provide. I am looking for a solution that will control a thermostat from afar at several different sites. I have a management staff that would be in control of the temp.

These are health care locations, however, basically single-family homes. All forced air, some with several furnaces but at the most two thermostats. There is 24 hour staffing. The problems that we find are:

1.) Staff will turn the temp up or down to meet their personal needs, which may be contrary to the needs of the home.
2.) Two staff may war over the thermostat.
3.) Where we have more than one furnace, I have found wildly different temperatures set. This is likely to a non-understanding of how the zones work. For example, one section of the home will have the furnace off entirely in the middle of summer. The other t-stat on the opposite side of the home will be cranked down to attempt to cool the whole building. Most of the folks that work for me are not homeowners, so they don't understand the interplay of such things. I have many more head-scratching examples of things we have found, like open doors in the middle of summer as it was too cold otherwise.

I have caged the thermostats in the past. This is difficult to manage, as when the seasons change we then need to run out to physically make adjustments. I live in upstate NY, where you can have an 80 degree day followed by one with snow flying, especially this time of year. Some control needs to be available.

I also bought a Honeywell that you could control lock, which was about $200, at one location that was a huge challenge to manage. The HVAC company that we used at the time, after doing a service and hearing staff complaint, replaced it with some $30 version that they could now control, as they didn't have the PIN for it. We didn't even catch this until about 6 months later, as there was no approval for the work as they didn't charge us for it. I am sure they saw the benefit of walking off with the expensive thermostat...

So, I looked at the Nest as well as the Honeywell TH9320WF5003. I have no clue if we have the noted "C" wire for power at these locations, but I am willing to have one run if need be. The Nest seems to be more suited for a family. I am not looking to save money as you would expect from a programmable thermostat - I just want even temperature throughout the night and day. As well, without the ability to make huge swings in temperature.

It would be nice to be able to manage all of the locations from a single computer and a phone, with the computer being the main control.

Any help would be appreciated. Thanks so much.