The text plays on the common saying 'Two can live as cheaply as one,' suggesting that two people can live together without incurring much higher costs than one person living alone. However, it adds a humorous twist with 'for half as long,' implying that the savings might result in a shorter lifespan, possibly due to the stress or complications of living together. This twist relies on the unexpected conclusion rather than a play on words or similar-sounding words.
Two can live as cheaply as one , for half as long .