No matter what router you'll choose, 5GHz is by default limited in its range. So, you either need to be closer to the router or use 2.4GHz.
Welcome to Kitz forum.I'm surprised 5ghz is limited in range, my Mikrotik router is capable of receiving a 5ghz wireless signal from 12 miles away.
What's at the other end of the 12 miles?
What antenna are you using?