I bought a duplex with my sister in San Francisco. We share resources, split the mortgage, and babysit for each other.
Briefly

Buying a duplex together allowed two sisters to live close while sharing costs. This arrangement supports their families financially in expensive San Francisco, with savings on mortgage, property taxes, and utilities. Their kids grow up together with the added benefit of built-in babysitting. Regular date nights become possible due to the proximity, creating a joyful environment for both families while managing the chaos of daily life.
Each month, we continue to save on utilities, like garbage and water. Splitting the mortgage, property tax, and insurance made homeownership feasible for us.
One of the best perks of sharing a duplex is that not only do our two little guys get to grow up together, but there's also a reliable babysitter just a flight of stairs away.
Read at Business Insider
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