|If both buildings share the fuse box/circuit breaker box,you might consider the homeplug approach?|
You would use two modules, one in each building. one connects via cat-5/ethernet cable to your router, the other in the second building could connect to a second router (which can be configured to be both ethernet and wifi. Or in the second buliding you could use a wifi module, which again goes into a mains outlet and will allow wifi that way.
Home plug systems use the mains wiring to carry network traffic around the area. They come in ethernet only connection, ethernet and wifi, wifi only.
Also, as you say the distance between the two buildings is 10ft, you could consider a weatherproof cat-5/ethernet cable between them? Rig a suspension wire between the buildings, loosely strap the cat-5 cable to it. It would terminate into an ethernet outlet box in the second buildind, and go straight into you currect dsl router. Allow a degree of spare cable at both end for convebience and flexibility.
message edited by trvlr