元もとが掛かかる

expression, godan verb (-ru)

be expensive; cost a lot

Used when something requires a large amount of money or resources; often implies the cost is burdensome.

• この趣しゅ味みは元もとが掛かかるので、なかなか続つづけられない。

  This hobby costs a lot, so I can't keep it up easily.

• 引ひっ越こしは何なにかと元もとが掛かかる。

  Moving house is expensive in many ways.