Not impossible. Maybe not cost effective. Do you have a clear line of sight between the two points? If so, you can do it. The Wireless Internet Service Provider (WISP) industry does this. If I had line of sight I'd try just to see.
It is possible but you really got to know what your doing. You can do it via using wireless bridges made by Ubiquiti or Engenius for example. 900MHz is the best frequency. It would cost you about $400 in hardware and a decent skill set to go with it.