There are days that my kids make me feel young and days that they make me feel so old. We had an 8 year gap between our 3rd and 4th. It has been fun. How to be a parent is very different as I age. We do different things now than we did with the oldest and not because we have money but because of the energy it physically takes.
Good luck with your decision. I am sure whichever you make, you’ll get a confirmation along the way.