build castles in the sky

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build castles in the sky

To create dreams, hopes, or plans that are impossible, unrealistic, or have very little chance of succeeding. You need sound financial advice and a strong plan if you're going to start your own business—don't just build castles in the sky.
See also: build, castle, sky
References in periodicals archive ?
A LIVERPOOL dad will build a castle in the sky when he takes to the Gormley plinth.