I can say from a personal interaction with building fiber out to the tower that you can get done 100 towers in a year from start to finish. Most of the cell companies are utilizing the unused bandwidth of the cable operators who have a stranglehold on the market. The cell providers work with a 3rd party who does all that work for them with the cable company. Cable companies have the most and somewhat easiest rights for access to conduit and such other locations that a company who doesn't have a presence or existing runs through a market.
