You have to be careful when demonstrating your financial position. Unless you have it in writing, we don’t recommend sharing that with the Visa Officer as it may be perceived as a risk and ultimately reduce your chances of getting your visa.
Try to show a solid financial position using your and your sponsor’s non-liquid funds. If you have the time, you could also apply for a Student loan and have an approval letter handy. Showing a solid financial position will help your chances of success.