Those lamp posts aren't close to every space. Are you going to run extension cords for the 150+ feet to each outlying vehicle? No? Then you have to tear up as

Those lamp posts aren't close to every space. Are you going to run extension cords for the 150+ feet to each outlying vehicle? No? Then you have to tear up asphalt to lay down new lines. That's not cheap, especially with a USPS that's so strapped for money right now (for political reasons).