When an impoverished single mom is diagnosed with cancer, her teenage son solicits treatment donations by attempting to break the Guinness World Record for continuous wakeboarding of 12 straight hours.

Agreed with DPG, perhaps best to make it that he must win a contest instead of rely on pledges and record breaking?

I think it's safe to say that wakeboarding hasn't quite hit the mark, according to the other comments, have you considered other sports? Running could be far more applicable to an impoverished family - all it will cost is the price of a pair of shoes. Just a thought as I believe that the inciting incident is sound, but the method to achieving the goal raises too many problems.

Good rewrite, Richiev, and a good question.

I would begin the logline like this:

"When his mom is diagnosed with cancer, and impoverished?wakeboarder?vows to break the world record in order to pay for her treatments.?"

This makes the logline more personal.

(Just curious, in order to wakeboard you need a boat. Is this really a sport that a poor person would do?)