I can't help personally as I only have the 2DD's, however my mom is one of 9 and my father was one of 14. DH is one of 4 boys.
My mom's family to this day is very close, 8 siblings are living, and 5 live here, about 20 minutes from eachother. 2 brothers are in Montana, in the same town, and the rebel daughter is in Texas.. They all come home 1-2x per year, and usually there is one of either the kids, or my generation heading out to see them, or just coming back from there. (we spent 3 weeks in montana in 98)..My grandparents just celebrated their 62nd wedding anniversary
My fathers family was different, his mother died when he was 14, he had 7 sisters YOUNGER than him, that his father had to raise. They were very poor. Some of them still are. My father was the most successful in his life of the family, in ways of finances. Very money smart he was!...they despised him because of it, though he always gave to them etc... the family is dysfunctional. Many of the kids are/were alcoholics, and none of them have very strong relationships with their own kids
now, DH's family. First let me say they are full-italians....now most Italian families are very close to begin with, Family is the 1st....and these 4 boys, are the closest siblings that I have ever seen.
DMIL has told me many times how they raised the 4 boys..who are all 2 years apart....DFIL first worked for his father, then started his own business. DFIL worked 70-80 hours a week, and DMIL raised the boys, she also did the books for whatever company DFIL owned at the time. the boys, once old enough, worked for DFIL as well. To this day, we are at DMIL's at least 2x per week year round, and when we're there, at least another boy is there as well.
I am a selfish person when it comes to kids. With 2 DD's I can still live the lifestyle that DH and I have become accustomed to prior to having kids. Given any unforseen circumstance, DH and I will be able to retire young, and have $$, and DD's will have a hefty college fund, or should they chose not to go to college, a nice size trust fund. DH and I trade in our cars/trucks often, I am able to buy what I want for not only me but the kids as well, and I guess maybe that's shallow, but I am able to choose how many kids I do or do not have. Luckily I've been blessed with 2 beautiful daughters..
Congrats to you, I think it's an amazing opportunity for you, and I wish you the best.
Brandy