To live in a 3 bedroom house in North America, a person has to work atleast 8 hours a day to pay for the rent. Sometimes, that is not enough. Some people without a high paying job have to work 12 hours to 16 hours a day to live in such a house. So much work is required just to live in a tiny little house of this world!
On the other hand, the houses of Jannah (Paradise) are not made of 3 bedrooms. Rather, they are gigantic palaces made of the most precious jewels from the treasures of Allah. In this world, we are spending so much time and energy for the 3 bedroom house, however, what are we doing for attaining Jannah?