Sorry to hear you've lost so many to cancer.
I think there are many ways to treat and cure it. Basically it's often about correcting the problem or conditions that allowed cancer to take hold in the first place. Understanding our endocannabinoid system is part of that I think. Avoiding cancer-causing foods and drugs is obviously extremely important. Organic and raw food as much as possible, less white sugar, less processed, less alcohol, less smoke, and so on. Sometimes I think surgery is the best option, followed up by lots of RSO (cannabis oil)for healing, pain control, and to deal with any residual cancer cells.

A friend of mine's father was serious ill with skin cancer, which he healed using RSO:

But I also have a friend with liver cancer and he's not having much luck with the oil. It seems a lot more research is necessary, but in a lot of places, we're still trying to fight prohibition so that we can grow, extract, use, and experiment with this awesome plant.