@cookie34ss6 My experience for you and others in the same situation... I felt similarly after having my second and going back and forth over a third. My second is a unicorn kid ("easy" lol) and it just seemed like things would be so easy if we stayed there. But I kept feeling like someone was missing, when I watched them play I kept imagining a third kid, it was wild to me. Prior to kids we always said we'd have just two. The feeling wouldn't let me go though. So we did have a third.
I was scared to do it. We have my inlaws who are local and help when they can. When they were younger (currently 7, 5.5, 4) there were many times I would feel despair and cry on the weekends they couldn't babysit because I really needed a break. The young years are/were so tough for me.
I think it was one of my hardest transitions. My two older ones were still young toddlers at the time and it was tough for me to juggle them and a newborn at home (sahm, oldest wasn't old enough for school yet). I think when your older kids are a bit older (like 3+) it can help a lot bc they have some independence, do some things on their own, can communicate better, sleep, etc.
We love it. I'm glad we did it. It's been great having this little gang. Everything feels full. Yes there were hard phases but that's part of it, especially the super young years. Two kids just didn't feel right to us in comparison to experiencing life with 3, even if it would've been easier. So that comment about the survey, I think that kind of stuff just really depends on each family. I do agree though that when you have 2 or more kids it can help change perspective on things and allow or force you to let go of stuff. For example the house is always a mess. It's loud and chaotic. When I clean up they destroy (play) behind me. It's okay though. They're happy and healthy and it wont always be like this (though I'll be honest the mess and loudness make me anxious but that's not their fault).
In fact we enjoyed 3 so much we actually have a 4th (who is 2.5). Also a hard transition for me but a lot better now that they're a bit older.
So after #3 we did have to get a bigger car (used, one previous owner who barely drove it and we paid it off asap), and rearrange bedrooms but it was okay. Husband wfh and moved his office to the garage. If you really want to do it you will do what you need to to accommodate.
It's also okay to stay where you are and just enjoy the ones you have. Read/search Google for "the ghost ship that didn't carry us" by Cheryl strayed. I read it a couple times when debating and found it very thoughtful.