You can make it cheaper if you are prepared to do the ground works and lay and appropriate cable, the electricity board will then just connect up both ends. Its much more expensive if the new lines have to cross a road etc. unfortunately it will be thousands though sorry.
If you rub her with a towel dipped in really hot water and wrung out it should just clean the coat and lift off grease without making her wet. use as hot a water as you can bear. Dip and wring out the towel between rubbing sections.