What should one do who is unable to buy a house or get married due to a low salary and the Islamic banks' conditions not suiting him, while opportunities are available to him from usurious banks, and with the passage of time, opportunities decrease due to rising prices?

It is not permissible to borrow with usury from usurious banks except out of a recognized শরعي (Sharia-compliant) necessity. This refers to a situation where one fears harm to one's self, limb, honor, intellect, or property, which then permits committing what is forbidden or neglecting what is obligatory. This necessity does not include extravagance at occasions, purchasing luxuries, building a house, or improving trade. It is advised to practice piety, seek forgiveness, and rely on Allah as a means of relieving distress and facilitating sustenance, while searching for Sharia-compliant alternatives to obtain housing.