A family support network can provide:
Moral support:emotional connection, guidance and a sounding board for tough times in life.
Practical support: an example that springs to mind is a friends family being tradespeople and having her house renovated including a loft conversion for materials cost only.
Childcare support: childcare is shared amongst family like grandparents which helps with work and in turn family finances too. Also good for your marriage if you can have marriage date nights if grandparents can have kids for sleepovers etc.
Financial support: self explanatory, a privilege to have things like house deposit covered, one off big expenses, even new winter coats for kids.
I have never received any form of support. I never had my own room from age 15 and slept in the new "guest" room of parents house as they wanted younger brother to have my room and make his old room into a "guest" room mainly for a pc desk, bookshelf and futon...I was told once 16 I'd pay rent or would be out. At 16 (mid 00's) I had to pay £30 a week rent and all my own things like clothing etc. At 18 it changed to £50 a week. I was homeless at 18 and half as mum would have manic episodes and I was chucked out/sofa surfing about 14 times between age 16-18. I ended up just walking into police station one day to say I had nowhere to live and they connected me to the council homeless and I was in a few different units.
But I was told from as early as I can remember once I'm 16 I'm on my own, i was an accidental pregnancy coupled with gender disappointment as they wanted a boy and named me the female version of the male name they had picked out...
As an adult there has been zero support.
I have a long term private therapist who I lean on in difficult times, for instance I had a bad car accident and so I took a few sessions. I take maybe a handful of session each year but at this point it is no longer therapy but more like a sounding board and life advice. So in a way I can replicate a form of moral support.
I can't replicate childcare like for marriage date nights, practical help or financial support...
In contrast I am a devoted mum myself and I try my best at being a parent, I'm not perfect as no parent is but I am trying - all while no contact with all my family for years.