If you do not have enough money then of course you have to take student loan either way. If it's optional for you, then it depends on the interest rate. If you can beat the interest rate then yes, otherwise might as well use your money. If is interest free then just take
Do you mean the student loan that's interest-free during your studies? Can take it and work towards paying it off immediately after graduation.
If it isn't interest-free, I'm not sure...