Workstation Safety Picture Network Segment?

Network Segment? - workstation safety picture

I am volunteering for the division of public safety at a local show (non-profit, public security = little or no money for extras)

Currently have a pretty decent network, all Cat6, Windows servers, some software applications, Internet, broadband, 9 workstations or so .. nothing .. Imagination, but it does for them. In any case, the problem.

A second building, due to the location of the cable / DSL internet is not an option ($ 2K + guide to local businesses), the building where I am, this is literally the last line cable. They want a network segment between the buildings run .. PVC-U tube or something like that ... But the distance of at least 300 ", in the vicinity of the limit of 328" is a segment ..

To stimulate How do I change the gameIng signals when the distance more .. or do I really need a repeater network .. the world and on the other side to return .. one .. only the changes ... Hall of cable would be a good 50 "for the outside ... Suggestions?