This thread has been very enlightening.
I've installed several VPNs at small businesses over the years. IIRC the Cisco RV082 is mac-compatible, and fairly easy to set up. That would get you a good secure connection to anything on your home LAN such as file servers, custom app servers (apps written for your small business or for your type of small business like lawn care business etc), printers, locally shared hard drives, etc.
Also another alternative is to use back-to-my-mac to teleport home and web browse from your home machine if needed. BTMM is encrypted afaik.
