I Got Rich After an Arranged Marriage Swap

[No romance; her lifelong goal is to live a healthy, leisurely life] In her previous life, poison seeped into her bones, leaving her bedridden for ten years.

Her husband, who acted devoted to her in public, was secretly involved with the legitimate daughter of her adoptive father. In the end, she was starved to death.

Her poor brother-in-law fought in wars his whole life, only to raise someone else's child, and eventually died at the hands of an ungrateful wretch.

Reborn into a new life, with gold, silver, and iron mines at her disposal, what can't she do? There's no harm in taking a seat at the very top, either.