Regarding sending children to Gurukula, that is also optional, not compulsory. The most important things are that you follow very carefully all of the rules and regulations such as rising early, and having mangala arati and classes, etc. and that you chant at least 16 rounds daily without fail. These things are most essential for your spiritual advancement and then everything will be alright.
Letter to Tirthanga dasa, 14 March, 1975