That China Study, man--it brings in a lot of us.
Anyway, welcome. That's great that the men in your family are on board. You might be surprised what your sons will adapt to, given enough time. Education and just plain trial and error can produce miraculous results.
If you would have told me three years ago, for instance, that my husband would voluntarily give up meat and cheese, I would have fallen over with cynical laughter. But it happened.
Let us know if we can help you with any stumbling blocks, because living this way is actually darn easy after you get some new habits established.