Buying a house for the sake of marriage is not something I would recommend.

First, if marriage requires a house as collateral, the 'marriage' itself is likely high-risk, as it ties wealth rather than emotions.

Second, if the house is bought with a loan, it becomes a leveraged action with a high leverage ratio and a long cycle, which locks in liquidity prematurely, eliminates other investment opportunities, and exposes you to risks from various fluctuations during the cycle.