Great info from everyone. So, let me see if I can sum up a reasonable plan of attack in laymans terms.
Plant a dedicated beefy server computer in some hidden corner of one of the exam rooms (since the waiting room is probably a bad idea) that will not be used as a work station at all. Have two workstation computers on the office wireless network. Wife uses one to see patients and I remotely log into second workstation to take care of front office business. When wife is on a house call (presumably after-hours anyway) she accesses #2 workstation remotely from the laptop she usually uses as #1 workstation while I enjoy a break from front office duties. I can't imagine not having access to AC and e-prescribing while on a house call and I definitely want to avoid any sync difficulties.
We've been using Clear for our internet. It's unlimited 4G internet service for $50/mo with excellent coverage in our metro area so when she needs to make a house call, she just takes the hot spot with her. The device has an internal battery so she just leaves it in her bag for house calls and never messes with setup. I'm seriously considering keeping our current WiFi hot spot for remote access needs (front office and house calls) and purchasing a second line of 4G service for the intra-office network rather than mess with landline service.
