- If she is staying with you, you can come up with a number for the numbers of days she is staying in Canada as her expenses. Does she have any money in the bank? She has to show her proof of funds, For example, you can't say she has 10K to stay in Canada and not show any proof of funds. If you are indicating that you are helping her with the expenses you should show your own proof of funds as well.
- About your second question, Why do you need to add travel history prior to 5 years? The forms only asks for the past 5 years so more than 5 years is not relevant to her application.