Re: "the large geographic area of the United States aggravates the capex costs."
methink some of data wrong.
Example: according to the list of urban areas noted above, Miami, Florida shows as:
4 Miami, FL 5,502,379 3,208.0 1,238.6 1,715.2 4,442.4
This means that Miami is the #4 urban area in the United States, New York, Los Angeles, and Chicago. Hmm. This shows a population of 5.5 million. The problem is, however, that according to http://www.census.gov/quickfacts/table/PST045215/12086, the actual United States census people, the population of the WHOLE OF MIAMI-DADE COUNTY is 2.7 million, or half that. Okay. Maybe the 'Miami urban area' includes not just Miami-Dade County, but Broward County as well, even though one would think that that's the 'Fort Lauderdale urban area'. Oh. Wait. According to http://www.census.gov/quickfacts/table/BZA110214/12011, the population of the whole of Broward is... 1.9 million. Miami-Dade and Broward combined don't hit 5.5 million. Palm Beach County, north of Broward, is another 1.6 million. We'd need half of the population of Palm Beach County added to the complete populations of Broward and Miami-Dade counties to get to 5.5 million. I'm pretty sure that residents of Boca Raton would be surprised to learn that they're living in Miami. As would residents of Boynton Beach, West Palm Beach, Loxahatchee, Belle Glade, Davie, Weston, Tamarac, Coral Springs, Coral Gables, Kendal, Doral, Homestead...
me no trust figures in https://en.wikipedia.org/wiki/List_of_United_States_urban_areas. Me think you should not trust them either.