put somebody to the expense of something/of doing something
put (one) to the expense of (doing) (something)
To force one to pay for something, especially something very expensive. If we're going to put candidates to the expense of flying over here for an interview, we should at least pay for their accommodations. They're trying to put us to the expense of a court trial to discourage us from pursuing them for a refund.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
put somebody to the expense of something/of doing something,
put somebody to a lot of, etc. exˈpensemake somebody spend money on something: Their visit put us to a lot of expense.
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