Power lines are paid for by whoever needs to extend then to get access to a new area. In a new construction house project, this is a significant expanse. Buried lines are more expensive than above ground lines. They also require an easement of like 50 ft on either side of bee buried limes which means clear cutting those trees and never letting them grow back - due to regulations. I determined that it was about 3x cheaper to simply build an off grid solar system than extehd the power lines, and don't regret my decision one bit