3 sentences

1. 这笔房贷的还款年限是二十年。

   zhè bǐ fáng​dài de huán​kuǎn nián​xiàn shì èr​shí nián.

   The repayment period for this mortgage is twenty years.

   Source: Dong Chinese Dictionary

2. 他上个月终于还清了所有的房贷。

   tā shàng gè yuè zhōng​yú huán​qīng le suǒ​yǒu de fáng​dài.

   He finally paid off his entire mortgage last month.

   Source: Dong Chinese Dictionary

3. 沉重的房贷成了他巨大的经济负担。

   chén​zhòng de fáng​dài chéng le tā jù​dà de jīng​jì fù​dān.

   The heavy mortgage has become a huge financial burden for him.

   Source: Dong Chinese Dictionary