Our daughter was in a krippe from 6 months old, as we both worked. I cannot say that I regret a moment of it now at 6 years. She is/was far mor socialized than her peers, and probably still is. I think that's great.
Can I just ask why your husband feels that a child should be home until 3 years old? With all due respect, I absolutely disagree. I know we all have our opinions, but it minds me of the doctor who told my sister to keep her newborn in the house for 3 months because fresh air was a bad thing for a newborn. And she did it!!