Well, I had my kids as follows
Dc1, 1999, Me 29,
Dc2, 2001, me 30,
Dc3, 2003, me 33,
Dc4, 2008, me 38.
I would say, when they are little, it is hard work, but uncomplicated.
Now I have 4 kids, the logistics and the school stuff, keeping on top of everything, and basically looking after 6 people of hideously stressful. Think long term, VC and what the future might look like. And anyway you do not know how it might work out. My first 2 are only 18 months apart. They were like twins, very very close. Wanted the same for 3&4. Didn't happen. Gave up. Then years later, total surprise, came dc4.
Love them all. But logistics of 4, in 3 different schools, is s bloody nightmare