You can apply for TRVs although you may be asked to apply for TRVs from some visa officers. Unless your wife is going to be making significantly more than you or working alternating shifts it will be extremely difficult to live in Vancouver with a family of 6 with around 50K a year. School can end between 2-3:30pm and start between 7:30-9:00am depending on the schools. Since work times rarely coincide with work times plus commuting times, you must pay for childcare before and/or after school. That could easily be $350-700/month per child. It may not make sense for your wife to work during Traditional work hours if childcare costs more than her salary plus transportation costs. Finding accommodations for a family your size will likely take at least 50% of your salary in greater Vancouver. You really need to look at your budget and the cost of living in Vancouver plus when you will qualify for CCB which will at least help you with some basic costs like food.