Apart from wifi, you might also consider Powerline Networking for
bridging larger distances in . I don't know about your power system
there, or availibility of these devices, but in the US, A pair costs
about $120. One unit connects to your router and plugs in to adapt
the ethernet onto the building's power circuit. One or more
additional units can be plugged in wherever you need to network. More
reliable generally, than wifi.
And, at any point that you want, you can connect a wireless access
point/router to the powerline networking adapter.
Here's one brand:
http://www.netgear.com/Products/Powe...tAdapters.aspx
The 84 MBPS system is known to work well.
Steve