People are older when they buy their first house because it takes time to get a deposit together. This means they have less time to make all these different property moves before they start having children which really clips your wings and slows you down.
When we came to London dh and I both earned tiny amounts. I earned £1200 per year. The mortgage we were offered was virtually 1/2 the lowest cost of the tiniest studio flat. Dh and I worked as many jobs as we could, going from one job to the next to raise enough to buy the tiniest grottiest studio flat qw didn't go out, and were completely exhausted but after a year we had raised the amount we needed.
A freinds dd was talking about how she needed to earn more money but when I suggested that the local launderette was looking for someone and / or she might try the local pub as they were also short handed she was horrified.
I have moved in and out of London over the years. At one point dh was doing a 2 1/2 hour commute, running a business and studying for exams on evenings and weekends.
Those who think Zone 2 is the only place to live because otherwise you have a 90 minute commute in must have blinkers on. Dd and dh both work and go to school in central London. Dhs commute in to work, door to door, he works in the City is 45 mins and dd gets to school in 34 mins. We are not in any Zone, we live outside of London.
I was nearly 30-40 miles outside of London a few months ago looking at different areas and found a station that gets you into Central London within 25 mins, that is door to door. The houses were very very affordable, Think 4 bed houses all done up for the average price of a 1 bedder in everyones favourite Zone 2.
Yes your travel expenses are more but when you consider the cost of your extra mortgage and the fact you will need to stay in rented for that much longer it starts to look affordable.