Big Family

My fiancé and I want 2-3 kids. Preferably 3. I’ve done some googling but haven’t found much to answer my question: how much should a family earn annually to comfortably support a family of 5? I know it depends on where you live and other factors but I mean ballpark. My heart is so set on 3 but I don’t want to get my hopes up. Also please specify what currency you’re using if you throw out numbers. I live in Canada but can convert it if I know which dollar you’re speaking in.