The symbolic significance of the man giving you three real estate licenses may need to be comprehensively considered according to your feelings and the specific situation in your dream. In some cultural backgrounds, houses usually symbolize security, stability and wealth accumulation. So this dream may imply your longing and expectation for the future, and you may hope to have a stable family and economic conditions, as well as the guarantee of life.
However, dream interpretation is not standardized and very personal, which needs to be understood according to your specific situation. If you have doubts about this dream, or need more details, I suggest you find a professional dream analyzer for further consultation and interpretation.