Richmond?
Actually Richmond isnt that bad compared to some of the areas nearby. When I moved down here with my girlfriend we looked all over the west of London and found that we'd still be paying roughly the same whether we live in Richmond or Ealing or even Acton, obviously if you want to live on Richmond Hill its going to be a bit more.
My girlfriend and I have a one bed flat which costs £1k per month between us which really isnt that much, the council tax is a bit sharp mind at £1600 per year.