my dear colleague,i am also doing master in english in literature from karachi university as a private candidate. to do M.A ENGLISH as a regular candidate you require two important things,one is time and the other is money.as you explained earlier that i am a teacher,then surely you will be run out of time.secondly you also lives hand to mouth. so i advice you to do it as a private candidate. as a regular candidate,it needs more than 50,000 to do that. as private it will cost only about ten thousands. you just believe in yourseld and start working hard. inshAllah you will come out with flying colors.