It is possible but not easy at all.

As for me and my frs that  we study better when we work around 50 hrs a week than without working, I tried that last semester without working and didn't work.at all.      u know u  can do it  but it is really hard to make good grades even without working

 If u work u will be a able to manage ur time for study without working u always say I will study later and that Later never comes. believe me bro or sis I've been there and done that.

may be ur fr is PUSTAK PARSAD(Book kumar). but that is very good for him. U also need to learn from him . I think He might be inTX and UTA.