Everything everyone said plus this:
It’s always been easy for me to get 3 toddlers ready in a little pack, package 3 little ones off to the park, cook for 3, play games for 3, give each one cuddles, then synchronised bedtime for 3. School run for three. Etc. all the group stuff is easy and a piece of cake when they’re small!
it gets trickier when they grow up and start living separate lives (and you want to be part of their lives)
with 3 kids you’re doing 3 parents evenings, 3 after school sports clubs, 3 tucking in at night, 3 young people with a life to chat to and worries to listen to, 3 matches at weekends, 3 birthday parties to organise. So you can actually add how much more work it is in real numbers! It is a lot and honestly, you’ll be giving your all every day.
Then when the older two are off to do their own thing in half term and you could be finally free to work more you still have a 10 year old to entertain. So another week kind of shot.
3 people to bicker more among each other, the opportunities for clashes seem endless! And mine do get on generally.
Also if you currently have two, add a third more noise level, laundry volume, dirt and marks to wipe away, spills to clean up, toys to tidy up, days off work for a sick child. Just add a third to everything you’re doing.
I wouldn’t change my 3 for the world but three is hard and takes sacrifice.
We have 2 year age gaps.