all the coaching centre usually have almost same fees structure but i would say that you should give there entrance exam which offer a variety of scholarships and fee wavier. Also you should choose the coaching centre carefully knowing there past results, most importantly the batch size because if the batch size is small teachers would pay more attention and take your doubts more frequently and lastly the faculty.but at last it is your hard work.

you should give the entrance of all the coaching centres in your city and then decide among the best considering the fee waiver they have offered you

if you could tell me your city where you will be doing your prepartion i would be able to tell the exact comparison between the fees and which will be the best for you.