I am a office temp in a bicycle factory in the uk. I have voluntered to help with linking all the buildings together in a WAN. We have a main office building which is situated in manchester and 200 yards accross a main road is our design department. Our shipping department is in a town called stockport which is 5 miles away. I know very little about networking, but i wanted to show up the guy's at work becasue they think they no it all. I think the main office and the design department can be linked together by wireless and the shipping department can be linked by a DSL rented line.
We have 5pc's in each bulding and they are already on separate networks. The network must be fast and secure and there must be file sharing and print sharing available to all 3 buildings. The budget which has been allocated is £40K.
Any advice will be greatly appreciated.