Many people manage without handouts or living at home rent-free, just by living modestly and saving hard. We did it with no handouts in the last 10 years.
DP and I lived in a studio flat, walking distance to work, for 4 years from 2007, for £500 per month rent, while earning salaries of 19k and 23k and working any overtime that was available. Any holidays were a weekend away. We always tried to feed ourselves for under £7 a day, combined. No cars (which was awkward at times but we managed).
We saved 20k in that time, and then bought a flat for 180k, 10 years ago.
We then progressed in our careers to earn 30-35k or so each, and continued to save as much as we could. Within 5 years we'd saved another 40k, and our flat had increased in value by 15k.
We sold it and bought an (extremely) doer upper house for 300k, a few weeks after DC was born. We've refurbished, then extended it, in the last 5 years, again through savings (plus adding another 80k to the mortgage).
It was all just saving. We got no inheritance or deposit gifts from anyone. Actually, for our first flat, DP's parents paid our £700 (from memory) solicitor fees and my parents bought us a bed and sofa. We could have bought these ourselves, but instead put the extra £1.5k into our deposit (didn't make any difference to the LTV or interest rate).
So it can be done. Our lifestyle wasn't very instagrammable though!