This is a really nasty, cold-hearted piece of writing. I can see you've worked hard at the style: it has that self-satisfied, superior-minded ring about it that

This is a really nasty, cold-hearted piece of writing. I can see you've worked hard at the style: it has that self-satisfied, superior-minded ring about it that is so often found among the "columnists" of all those ghastly overstuffed weekend newspapers and passes for "dry wit" among the modern-day chattering classes. But really, are you proud of yourself for being so mocking and judgmental towards all these people? Is that what they teach your wife in church? I don't believe for a moment your opening claim that your desire to rent out a room was motivated by an aversion to selfishness. You sound like a deeply unpleasant person to me. I hope nobody I care about ever rents a room from you.