Dreaming about buying a new house or building a house indicates good luck and good results in work and career.

Dreaming about a new house heralds the arrival of a new life.

Dreaming about a new house also indicates that your luck in making friends will increase, and you will be able to talk to other people.

So the advice given by your in-laws means that your relationship with them will be very good in the future. I hope you will adopt it