The calculator tells you whether a furnished monthly let pays. This tells you how to run one. Forty-seven pages on the whole model: which unit rents itself, how to price it, who actually rents for thirty to ninety nights and how to reach them, furnishing without overspending, the turnover routine, screening the occupant, and the tax position. It covers both ways to hold a unit, the one you own and the one you lease from somebody else, with the real break-even for each. It also sets out the legal position city by city, because the thirty-night line is what keeps a furnished monthly let outside short-term rental rules in most places: New York, Los Angeles, San Francisco, Seattle, Boston, Washington, Chicago, San Diego and Miami, plus an appendix on Amsterdam, Dublin, London, Nashville, Sydney, Berlin and Houston. Written by an operator who built ten furnished rooms in twelve months, including the worked example where furnishing the flat loses money.