The following is a letter by Srila Prabhupada to one of his disciples (dated 4 July, 1971) explaining the responsibilities of householder life.
My Dear Babrubahun,
Please accept my blessings. I thank you very much for your very kind letter dated 25th January, 1971. Yes, you may get yourself married, provided that you can meet the responsibility of grihastha life. If you marry you will have to work to provide for your wife and family and try to spend at least 50 percent for Krishna Consciousness.
A Krishna Conscious marriage is not based on sense gratification but rather mutual cooperation between husband and wife for making advancement is spiritual life and also for raising Krishna Conscious children. It is said in the Vedas that one should not take on the responsibility of Parenthood unless he can deliver the child from the repeated cycle of birth, death, disease and old age. So in this way mould your life in service to the Lord and be happy.
Hoping this will meet you in good health.
Your ever well-wisher,
A.C. Bhaktivedanta Swami