I am coming a bit late to this party, but as someone who has both a main office and also sublets space, let me add my two cents. First, it is reasonable to expect your "landlord" to give you some permanent space, even if it is small. For example, a closet or file cabinet for supplies, samples, etc. I would ask for a small area for those things AND enough space for a small desktop and a router. Dell has some decent relatively inexpensive desktops with a pretty small footprint. You would need about 2 square feet on a counter or shelf.
With regard to internet access, can't you just get a cheap DSL connection to the office? In our area, Comcast and Verizon are competing for business customers with various packages-you might even save money on phone service by combining them.
So you have a desktop that stays in the office (cheaper than a big laptop), your front desk person brings her laptop and connects when she is in the office, and you use logmein from the hospital, home, or anywhere else. (Which you can do, even if she is on her laptop accessing AC over the wireless network).
And....when you end this temporary set-up, whether it is in 6 months or 3 years, you don't need to change your hardware when you move to your own office.
Will that work?
