I arrange to meet a number of landlords - and am stunned by the diversity of people I meet. One is just 24 years old, another is offering up his daughter’s bedroom now that she’s at university, and a third says I can stay in a log cabin he built in his back garden – if I’m willing to have sex with him in return. Most of the landlords I meet live alone, but one says he has tenants, and then there's the guy who lives in a London house share who wants to tell his housemates I’m his girlfriend.