Can you suggest which city should I go to for BBA and also it doesn't cost me that much?

In my opinion, what matters the most is your post graduation, so you can pursue graduation from the same city you live in. Still, to answer your question, private universities are expensive so I would suggest that you can come to Delhi, GGSIPU is comparatively less expensive than any private univers

If you are really interested in exploring commerce then BBA is best for you as compared to B.Com as BBA is a professional course. So you can choose BBA for your studies as it's going to help you a lot in your higher studies as well. And the cost is not that much even in good institutions, as I paid