How much does it cost to set up a mobile tower?

Excuse me, could you elaborate on the expenses involved in establishing a mobile tower? Are there any upfront costs, such as acquiring the necessary equipment and securing a site? Are there ongoing costs to maintain the tower's operation, perhaps in terms of electricity or repairs? Is there a standard price range that can be expected, or does it vary significantly depending on location and scale? Additionally, are there any permits or licensing fees that need to be factored into the overall cost?