J.✰.
Heck why would your husband WANT your child to go to public school? Esp if you want to stay home. I have an only child - he's almost 4. We plan to home school. I don't see why your husband wouldn't want to h-s him .... for socialization? The coop and grocery store and other life experiences (church?) will give him plenty. I say go for it. Would your husband rather your child get NO one-on-one attention and just get thrown into a classroom with 20 other kids at varying levels? Nah.
added: I don't know what the only child myth is ..... sorry I'm clueless!