If this is the typical 1.5 hp pump it will cost about $64 a month to run 9
hours a day. A 1 hp is a little better at about $52. He should probably see if
he really needs it to run that long. I am doing fine in SW fla with a 1 hp pump
running 6 hours on a 15,000 gallon pool.
Some of the problems are caused by poor plumbing design. Pipe too small, too
many elbows, not enough returns and suction side fittings. I spent a little
more on fat pipe and fittings but I turn my water over about every 3 hours.