In case it is possible to get a job easily, then it is advisable to complete the MEP course also. However there is demand in the field of HAVC field also. Completing any additional course is likely to add value in the overall profile of the job aspirants. It may be noted that no room should be left for offering any excuse later for remaining unemployed. Therefore in my opinion the author should consider completing MEP course also and then see later as to what happens. There is always a possibility that after joining a big company, the author can show his talent in the field of his choice and develop expertise in that field only through experience. Getting initial break is most important.