is she your real aunt? how she is related to you? is she filing taxes, how big is the house, how many people already living in the house?
Basis all above, if eligible, she can send you sponsorship which can cover your living expenses part. However, i would suggest, you can stay at your aunt's place and save your money, but while applying go for GIC as it faster process and success rate is high. If you provide your aunt's doc, then those documents will be verified and can delay the process. if you have CAD 10k, then u must go for GIC and do not worry, your money is safe and you can withdraw it easily. CAD 2k on your arrival in Canada and rest in 2k every 2 months plus you get interest paid on it.
Cheers!