Plant extension - survey results

I'm struggling to get new service to our home, which is apparently 530 feet from nearest equipment.  I got a quote for $1783 to run a plant extension, but I'm having a hard time getting any answers about the cost breakdown of this.  Our house is only about 100' feet off the ROW, so I'm wondering why we would have to pay so much for this install?  Is there any way to get a more detailed breakdown of this cost?

We would also be willing to sign a multi-year contract for services in lieu of paying the cost up front, because we're going to be good customers for many years if we can ever get service. Is any information on this available, please?