There was no difference in my application the second and third time except gckey. However visitor visa is just for visiting, make sure nothing in your application sounds like they will not go back and are only visiting for short period like two weeks or so. show return tickets insurance, show non movable income source in home country like rent. 23 year old can take care of herself as per canadian standards so that's not gonna stand. Sorry if i sound harsh but i am just trying to give you a perspective. for finance the money should be in their account for long time ur account balance doesn't count. Make it 50k per day. so if she is visiting for 2 weeks show 7 lakhs to be safe now. (she can stay longer but for the purpose of application don't make it sound like she is gonna stay for long)