Should I vaccinate my dog while on Hemp oil?

I took in a stray 5 years ago. I think she’s 8-10 years old.
She developed canine mammary tumors & I started her on Hemp Oil 3 weeks ago, as I can’t afford surgery to remove tumor.
She has lost her vision so I’ve cut back on giving her the Hemp. I now rub it on tumor.
I was told diatomaceous earth could help her immune system so I let her lick a small amount & her demeanor changed to happy.
This weekend there’s a Rabies Clinic.
Should I get her a rabies vaccine? She is outdoors. Sometimes raccoons or cats get into yard.
Please help.