Steve wants to install WiFi between two buildings. Leo says that after about 100 feet, the WiFi slows down. He's gotta get a Line of Sight for the access point between the two buildings. Mesh routers would help. Leo suggests looking at the RadioLabs website on WiFi extension.
Ed has a Google mesh router system and he wants to be able to get Wi-Fi out in his barn, which is 100' away. Can he get another mesh unit or should he do ethernet? Leo says that if he has a window, then he could put a mesh unit on the windowsill, and another in the window of a barn so they would have line-of-sight connectivity. It's certainly worth a try. Ed could also try powerline networking if the barn and his home are on the same junction. The other option is to use a Wi-Fi antenna.
Pat would like to extend his Wi-Fi signal out to his huge back yard, up to 800 to 1000 feet. Leo says that's a long way. Wi-Fi usually goes about 150 feet, maybe 600 feet if it's line of sight. Leo says it'll be a lot easier to string a wire. Pat could buy bridges and boosters, but there's limits to the power drive it. RadioLabs.com has directional Wi-Fi Antennas and Pat will need them on both sides.