Dubai

In my knowledge, UAE doesn't provide any PR for foreigner, so simple rule, if you have a job there, you can stay there, if you haven't, come back and Dubai is the construction hub of Asia, so if you are attached with some construction related study you can get jobs, so it is better to choose MBA courses in infrastructure management or MBA in finance / HR, etc. They need doctors also, but for you, it is not possible now.

No, we can only give information about IMT - Nagpur.

It is one of the emerging destinations. A lot of foreign universities have their branches in Dubai, American University in Dubai (AUD), Heriot Watt University, Manipal University - Dubai campus are very popular. Tuition fee may range from AED 40, 000 to AED 80,000 a year and the living expenses can range between AED 2600 to 3900 per year.

Listening to your situation and experience, if you go to Dubai or any other gulf country now, you would get salary more than you are getting now i.e. if you're getting Rs.20,000, so there you'll get up to Rs.4 to Rs.45,000 and living expenses are also negotiable.
I hope it helps.

SIBM Pune no doubt is the best college as it is within top 12 colleges of India and have a higher placement average of Rs 14.6 lpa.