"Please leave your email"
Unfortunately, the option to send "Private Messages" to forum members is no longer available, but I would strongly advise against leaving an email address in the forums; it will inevitably be harvested by spam bots.
You will need to outline what you are trying to achieve. It may be possible to use Powerline Adapters to connect the various buildings, but these do normally require that all adapters are plugged into the same Ring Main. Otherwise, connections will need to be either WiFi or by running ethernet cables between buildings. Running several computers in a WiFi network could be slow because the available wireless bandwidth is shared by those computers connecting to a particular Wireless Access Point (or Router).