I live in Kent. In order to buy, we moved from mid to East Kent, away from my parents and where I grew up. My parents helped us too - but actually the most important factor was that we are lucky enough to have been born in 1979 and we got onto the housing ladder before it became unaffordable. Even a few years later it would have been so much harder.
The town I grew up in is polarised and the demographics are not good long term. The rolls of the schools are falling. Families can't afford it, but people who retire from London can, which exacerbates the problem. It's a beautiful place to look at, but I wouldn't want to go back. There is nothing set up for families there - the people who run things and volunteer don't like the noise, and don't see the point.
When we bought here in 2013 prices were reasonable. They have shot up thanks to our town becoming a cool place to live and commute from. It's a real worry for people that rents are rising.
Basically there's a big discrepancy between wages and house prices, and it's getting worse. At least in London you can get paid well (I know, not everyone does). In Ashford or Folkestone a full time, professional office job can be in the mid to low twenties, maybe even less, and neither of those places are as cheap as they used to be, thanks to the high speed.
It's all very well posters saying that the first house is always hard - this completely misses the structural and demographic issues in the economy here, and the rapid effect of the high speed line. Trickle down economics don't work really - we have loads of hipster vegan restaurants and drugs and poverty. I really worry about this time bomb.