We have 5 DSs - oldest 16, youngest 9.
My DH decided after 4 we were finished but we played with fire
and our youngest son was born 1 year and a couple of days after DS4. We were all over the moon but we both decided that due to a very difficult and anxious pregnancy that he would be our last.
When DS5 was about 2 or 3 yo I got very broody again but kept saying 'maybe next year' but TBH next year didn't come, mainly I think because our family just 'felt complete'!
We are definitely finished now and no, it was not that we were trying for a girl like my mother-in-law told everyone, gender never mattered, just the health of our baby!!
I became a SAHM when our oldest was a year old but have since had some part time jobs that fitted round my DH so we always sorted childcare ourselves.
Yes, it can be very chaotic, crazy, noisy, etc with endless amounts of washing but I personally could never have imagined me with just 2 or 3 children (but each to their own) and it's a house full of love and testosterone and I wouldn't change it for the world!!
I personally think it was easier when they were smaller and you had at least a couple at the same activity, you could bribe them to tidy their own bedrooms, all at one school etc etc whereas now it's different schools, different clubs and other different essential needs.
My DH works long hours & I'm just waiting on confirmation that I've got a chronic disease which has been making life, housework, being kid's taxi, etc very difficult for the past year but I believe that it wouldn't have been much (if any) easier with less DC.
Good luck in whatever you both decide and for what's it's worth I believe 'you just know' when your family's complete 