We have an office with a wired network. We have another building about 500 feet away with a computer that we would like to get on the same network. This seems like a good use for a wireless network. The two buildings are almost line-of-sight. There is a tree and the corner of another building that may be partially in the way. What do we need to hook these two systems together? Actual brand names and models would be appreciated. Many systems advertise 900 feet of coverage, but I have my doubts they would work in this instance.