I believe you can get the cables buried for free. But it maybe depends exaclty where they are and how much cable is on your land. After all the electric company have to come on to your land to inspect the cables at regular intervals and have to have your permission for the cables to cross your land. Probably no good if the cable is just going to your house, but if it supplies the next village then maybe you are winning!
The cables were buried at a strip where I fly some years ago and It was certainly done for nothing there.