I would like to get an idea of a reasonable rent to charge DS (24) when he moves back from London in the summer. He has asked to move back in to facilitate saving for a house . He has been gone for two years. He earns above average wages and has no debt other than a student loan. We are Southern based. He works from home 3 out of 5 days with £320 travel costs pm. He is an athlete and eats like a horse. I asked for £300-400 a month. He thought that too much. I paid £100 pm in the early eighties. Advice/ averages? My friends don't have dc at home.