I am looking to extend WiFi to my Grandmother’s house next door, about 300-400 feet away. The internet needs to have at least 75% of the speed that the base router has. I’m hoping to find a setup that doesn’t require professional service to implement and doesn’t cost over $300. I would also prefer one that doesn’t require running cables from the outside in, but if I have to, I can make it work. Is this feasible? I only know a little about wireless networks.