Lighthearted: DH and I are idly watching a show about larger families (not the Radfords) and got to discussing if kids came in minimum numbers, what would your cut off be?
So if you could only have either 0 kids or 4 kids, 0 or 6, or 0 or 10, what number would it be that made you decide against it altogether?
For DH and I if more than 2 were compulsory we'd both rather have none.
In our imaginary scenario this doesn't affect your present financial situation, you'd be equally as comfortable (or not) as you are now, so primarily considering the level of chaos / time / organisation / share of attention / impact on the wider family etc.
Also in the imaginary scenario, they wouldn't necessarily be multiple births, but if you'd had one you'd be committed to having another X amount (let's ignore the obvious health / autonomy / human rights issues here for the sake of lighthearted discussion).