My recommendation is to go for Gargi over NMIMS.

The classes for BBA in NMIMS are held in a government college building opposite the main building campus where the MBA classes are held. That college is unkempt and does not have a nice infrastructure. On top of that, you’ll have to pay 2.25 lakhs every year for tuition fees and approximately 4–5 lakhs a year for living expensive all-inclusive. The hostel is cheaper but they are Non-AC, on a first come basis, and usually unavailable. Now, the placement report is inflated a bit.

Gargi, on the other hand, is a known DU college with a real cheap tuition fee. I am assuming you’re shifting to Delhi so the tuition fee for 3 years will be 60–70k. Living expenses in the Siri fort area may be expensive but definitely less than in Mumbai. It is also visited by good companies when I talk about Placements.

You will get equal opportunities after BCom and BBA as the course is similar. It’ll cost you less in Gargi and you’ll have better infrastructure.