We are probably wealthy by most people's standards. We own two properties and plan to pay off both mortgages in the next 5 years.
I would say it was a combination of luck, timing, frugal living and yes, some family money. I inherited a few thousand from a grandparent in my early 20s. I used it to get a mortgage on a cheap house (92k 3 bed) in Northamptonshire in 2012. We were there for 2 years and worked hard updating everything, doing lots of work ourselves.
We sold it for 130k a few years later so both saved on rent and more then covered out renovation costs.
My bf, now husband had done something similar before we were together and scraped money together to buy property which has doubled in price over 20years.
We both have a big savings mentality, have been on one cheap holiday in 6 years and otherwise take advantage of free nights on hotels.com or staying with family.
We don't have expensive hobbies, buy a lot of second hand stuff. I do a lot of DIY and DH is in IT so can do things like changing my smashed laptop screen.
We both have degrees as it was expected by family. As a result I have an ok part time job WFH, DH has an ok job in IT. We don't actually earn that much between us (about 50k) but because our housing costs are so low from buying early and we have second income from rent plus childcare was minimal because I was so flexible with work.