MBBS degree is one of the qualifications which has a better job prospect in comparison to other streams and there is still a need of doctors in many states in our country and some of the state Govt are also contemplating to get the MBBS doctors from other states. Only problem is that the first posting of doctors in state health services as a policy matter is generally done in remote places. So in many states the initial appointment is done in a remote place dispensary even far from a mediocre towns and many fresh medical graduates have apprehension to join a job in such remote places.
Anyway, to get a good job in a hospital, MBBS doctors will generally go for higher qualifications like MD or MS. That gives them a preference in applying in reputed places whether Govt or private institutions. In that light NEET-PG is a good option.
Now coming to the point of getting a job after only MBBS in cities like Mumbai or Bangalore. There are many small to big hospitals in these two places and a fresh MBBS can work in the capacity of assisting doctor and in fact will be doing as well as learning the intricacies of medical practices. Generally the renumeration to the fresh MBBS will be a small salary till one gets experience and then only one can shift to a better hospital. Getting a job in urban places is more difficult than getting a job in the remote and village like places.
So delaying NEET-PG will not be a prudent decision because the future career options are always better after PG (whether it is MD or MS).
In case you are not interested in PG course due to some reasons then there is another option of doing a 2 years diploma in the subject of your taste and choice. There are many areas in which this diploma can be done and then the job prospects increase accordingly. Some of the good areas where one can go for diploma are - Anesthesia, Child Health, Diabetology, Occupational Health, Paediatrics, Cardiology, Plastic Surgery, Nutrition, Psychiatry, Neuro-pathology etc.
Coimbatore is developing very fast and soon going to be a mega city. There are many medical institutions there including old age homes. I feel there is ample scope to get a job there itself and one can have the comfort of home and convenience of known place also. You can consider this option also.
Knowledge is power.