We had a similar situation and hence, I am here to tell you, you are sailing very close to the wind.
Our exception to this all is that my children were under my husbands military orders overseas. BUT when we applied for their N-600, we ran into all sorts of issues. For one, our applications kept being returned to the bottom of the pile because USCIS assumes that N-600 candidates live in the US and not overseas. Our saving grace was that being under military orders IS counts towards living in the US.
It was not an easy feast, both kids waited for more than 2.5 years. We got our congressman involved and finally sued USCIS with a writ-of-mandamus. Even during our interview, the agent was hesitant but her supervisor approved it. Meaning, we had a pretty solid case but I am 100% sure, we would have seen a different result if not under military orders.