@GorillaMon and @saintmax powerlifting and strongman has some good potential for charity, even though they are not lucrative sports. My gym helps run Relentless events (typically powerlifting and arm wrestling). The previous owners of my gym started the charity. They have generated a ton of money for medical treatments for kids.
The whole thing was never expected to grow to what it has. They wanted to pay for a couple procedures. It has become a multiple events per year, and has raised over a million so far (IIRC, several million).
What I am saying is that you both should continue your ideas of raising money though lifting. It might become something awesome.