Here is the scenario: My brother just moved to the house next of mine. I currently have a linksys wireless router which works in my house just fine. What hardware device should I purchase to make the wireless signal get from my house to the next house, so that we can share the connection???? The distance is about 40 metres but the problem might be the walls.
What devices can I buy to test signal strength???
Cat 5 cable might be cheaper but wiring through walls and stuff is gonna be a pain.

thanks for any help,
johnny