hello New B! Welcome again.
It's going to be very difficult to get enough cannabinoids to treat cancer without suppositories. In theory you could put 200 mg of CCO in each dose of edibles if you use a 1:1 blend of THC:CBD. There are several problems with that. One is that taking CCO orally greatly reduces the amount that can reach tumors because most gets metabolized by the liver. There are ways to help with that, bu it will still be far less effective than tacking and suppositories. The other problem is that at full dose taken orally your father will get high and may not like that either. CBD reduces psychoactivity of THC but at large doses there is still a strong effect. Suppositories and tacking don't get user high even at very high doses required for cancer treatment. Last issue is that for cancer you want mostly THC. Some people disagree on this point. I believe strongly that THC is most important for most cancers.
Here is link to page that explains the protocol many of us have used to successfully treat cancer.
A Base Treatment Regimen for Cancer
I took 1:1 CCO orally last spring without any improvement, although it was enough to keep it from getting worse. It may have been more effective if I had used it with the supplements recommended on the page linked above. This fall I started following protocol with suppositories and tumors have shrunk to no longer visible.
So get as much 1:1 CCO as possible into your father through his food and also use the supplements. My hope is that as you increase the doses his mood will improve to point he would be willing to try suppositories. If not the edibles with supplements may also work.
There are several members using DMSO for many conditions including cancer and I encourage you to look into that as well.
I wish you the best of luck with your father and your grow. We will be here to help you every step of the way.
And I hope you're okay with hugs because they fly fast and furious around here!
"furious" in a healing sort of way.