Vaccines are a huge risk. All you have to do is ask my sister who has two that are nearly entirely dependent on my sister for almost everything. They were perfectly fine babbling babies when they got those vaccines. They couldn't talk at all until they were 6 years old. My neighbor here, has a grandchild. She warned that mother not to give vaccines. Enemas everyday for this poor little soul. Probably bowel problems for the rest of her life, and she doesn't function like a normal two year old either now. So don't sit here and tell me the risk is "very very small." I know personally at least 3 children in my immediate vicinity (and plenty more) that have autism from the shots. THIS IS PART OF THE MASS MURDER PLAN to make our children zombies for the nєω ωσrℓ∂ σr∂єr. It's not even an argument. He's 100% right on this, and he shouldn't be demeaned or have to "apologize to his wife" for his stance.
Yes, organic, as you say "isn't as important" but if you can afford it, it's not hard to just pick up the stuff in the other aisle, rather than the stuff abundantly sitting in front of your face for cheap. Now if he were going broke over this (which it doesn't sound like, he's bringing in the bacon, obviously he's mathematically competent to know if they can afford it or not) then I could see trying to say "well honey, you just shop for whatever you want." And if he's bringing in that much, the problem here is not money.
This is not just an issue where you can go "oh well." If she continues this way, and decides to divorce, this will be HER fault. Besides, he doesn't have to grant it to her anyway. Perhaps when she hits "rock bottom," she'll begin to see what a warped mindset she really has. Eventually the children. seeing her proceed with such a thing, when older, will be able to ask questions about this situation, and he will have the moral highground. Yes, it will be more difficult, but it's more important if your wife is committing such a blatant sin against the very office of marriage, basically thumbing her nose in God's Divine Face, and saying "NO," you should NOT back down from the truth. God will reward you for long-suffering. Just stay close to Him.
I like Captain McQuiggs post the most about sanctifying the children and yourself. Prayer and fasting. These are good ways to deal with this, not "compromise" on this very grave issue.
By the way, I've been married for 15 years and we have 6 (going on 7) children here. I still say please go talk to your priest and ask what can be done.