Bert
Right, that is the case. I am expected to remove everything at the end of the workday, or at least not leave anything big. That's why we're thinking of using laptops.
Wendell
And you're right, I need to keep it simple. May be I'll scale back.
I checked with ClearWire internet. They have 4G coverage and they do have USB modems that I can plug into their router ("Clear Device") that will create a shared WiFi signal for all machines.
Thanks