What should i do after BE(ECE)??ME OR MBA?please help me for my right carrer.....I m confused now.?

I m doing BE 3RD year with 1st class.i want to make money in my life though i m poor guy.i m studying in govt engg college with 70% marks.i want to make my big house and buy a BMW AND MERCEDES CAR.i m very much confused.plz give me proper guidance...So i can start preparing for GATE OR CAT.