I do have 5. But it was with hubby's agreement. They are all grown up now. Achievable only because i worked from home as a childminder, housing was more affordable back in the 90s, and i am of that generation where men go to work and earn the lion's share of the income and women do literally everything else (as in all the housework and childcare)
That seemed a fair deal to be but i doubt it sits well today where Dads are a bit more hands on and women want a bit more housework help.
You can earm a decent income childminding though - i contributed ¼ the household income.
Once baby number 5 was born, i felt for the first time that my family was complete. Maybe because i was 40 then and i felt that was my very last chance. I had had 4 early mcs between baby 4 and 5.
All was well and having 5 was brilliant for us. And them I think! So much fun with a few kids.
I made a career out of being a Mum to my own and a carer to many others over the years. I was very fortunate in having a supportive DH but i was also very capable; having more didn't really put any extra burden on him. If we needed more money, it was me that worked more as his income was fixed.
But - changed times. Does anyone ever have another baby and regret it though?!