If you have multiple locations that are within line of site you can create a local network between these buildings using outdoor wireless bridges.
This saves you from purchasing internet in each location and therefore saves you money.
Call for more information.
Update to this post Nov 2018: Many new vendors like Mimosa have released new equipment that is a game changer. With improved performance and speeds links between buildings and clients of 500Mb/s and beyond are now a reality.