There is no set amount of savings that guarantees approval for depedents. All do is apply. Is this a 2 year program? If so will you have access to more funds to pay for the 2nd year of schooling and expenses. Where you are studying will also make an impact. For example if studying in Vancouver or GTA rent alone for a 2 bedroom would easily be around 2500 to 3k minimum and there is huge competition for rental properties due to the lack of supply. If your spouse has been working and has education and work history that coincides with skills needs in Canada that should also be highlighted as a benefit to Canada and a consideration when it comes to how you will support your family while in Canada. Would suggest applying asap because it will be difficult if not impossible to get a response before September for an OWP. If you have children 4 and above they should apply for a study permit. Although many government sites say TRV is acceptable we have seen school aged children denied TRVs and told to apply for study permits instead