Technically yes- anyone can build a cell tower on their property provided that the local zoning and permitting regulations allow for the tower.  However, you would need to work with a wireless service provider to have the tower actually function as a cell site.  Landowners are not able to purchase cellular equipment and broadcast cellular signals using that equipment.  If you want to know how to lease your land for a cell tower or how to contact the wireless carriers, please see our page on how to get a tower on your property.