House prices are horrible in London yes, but for transparency that's central London.
Prices get better (but still terrible) if you go further out. I just started looking at houses and for 500k you cant take a 40 minute tube journey twice a day and get a three bedroom house. With a yard.
The average room price at The Hilton is high as well. The solution isn't to sleep on the streets, it's to stay in a cheaper hotel.