家中經濟支柱

兩個都唔係,因bread解作麵包
你應用:
家庭賺錢的人home earner
或
家中經濟支柱 In family cornerstone

There is a term called breadwinner :a person who earns a livelihood, esp. one who also supports dependents.

Bread hunter

I think it shoud be bread-winner.