yes
i would explore & consider moving the offices too, especially if you can do what you want with a dedicated conditioned business line from old office to new office and then send out on a reliable lower cost internet link.
maybe good pots if you have to.
like you said, it all depends on the costs
if it fails, which should be rare, you can always drive to the old office space and go live there.
yet do explore the dedicated radios from the office to the tower to the remote end too...
maybe you could make some extra money as a business WISP.
:-)
- rh