Tom,
One of the best purchases I have made in the past few years is a Verizon Mi-Fi device that allows up to 13 devices at one time and converts the 4g to wifi. Travelling out to Indiana from Montana and back in the RV last year made working quite easy especially the closer we got to Indiana, not too many places without 4G anymore. And the device is password protected, so an added layer of security.
And of course Medical Dragon in the cloud is centralized too, just done in the cloud instead of locally on the server.
