Second this. I got some 5ghz directional units ($150 each?) and could share internet at 100mbps solid with someone 200~300' away.

Protip: Don't buy 2.4ghz units unless you don't live near other people, because any apartment building will be so full of 2.4ghz signals that you'll never get your own signal through that noise.

2.4ghz has 3 non overlapping channels, 5ghz has dozens. But 5ghz won't go through walls, and even glass windows block a good deal of signal so you really gotta mount the units outside, or at least 1 outside and one in a window. (But this also means apartment buildings don't leak nearly as much 5ghz because all the walls stop it)