Do we have another?

So I have a little boy who is in process as being identified with ADHD... we have a little girl who is very easy going and does her own thing. My hubby was ok with having another until the issues came up with our little guy and his possible diagnosis. I told him its fine and not a reason to not have another baby...I work part time and can handle three this I’m sure...but he’s not sure. Would it be wrong to have another? Or is this doable? It’s more that hes hesitant. He wants. To make sure we can still give our guy the attention he needs 💛