Rent a hotel outside and get married.

You said three methods, but none seems to suit you. But I think we can get married by renting a mobile apartment. You said you would save money. Although the furniture is not yours, you didn't buy it yourself! The process of getting married is still in accordance with the customs of your own family. We can make it clear directly from our parents. You don't have a house, do you I think every parent is compassionate, reasonable and will understand their children. He just wants to make you happy.