I didn't pay upfront. My Dad's Bank statement was over a year old, I have heard that it should be around 4 months matured, but I know a kid who got a visa with funds in his bank statement for just 2 months so it can be less. You should attach an employment letter from your parents if you can, my consultant told me an employment letter with a good salary will almost certainly clear you on this financial side.
What university are you planning to apply to BTW?
I applied into very low tuition fee universities in Canada .
One is University of Prince Edward Island: yearly tuition is 15,000 CAD
The other one is : mamorial university of newfoundland : yearly tuition is 13000 CAD
However here in the Netherlands, i am at Delft University of Technology where i paid 21,200 euros for a year . I am planning to attach my current university financial letter to demonstrate my parents affordability.
Furthermore , both of my elder brothers studies from the university of Manchester from the year 2014-2017 where the yearly tuition was 36,000 british pounds and they did come back after their graduation. This might be a plus point to my application?
I hope i do well on convincing the case officer .