MBA/PGDM

Wow, great experience, but as per my suggestion, you can look for other courses also besides EBIZ. Scenario in Ebiz is not that great. So, you can go ahead and apply for other core courses where your work experience will be valued more. Also, it depends on your interest also. So, make wise decision and go ahead.
All the best!

BIMM Pune, ISBS Pune, ITM Navi Mumbai, etc.

Yes, you can definitely aim for nice colleges with this score. I too have scored around 700 in my MAT Dec attempt and now have taken admission in BIMM, Pune.

No, it won't, unless you are able to explain the proper reason of that gap.

There are many jobs you can do which will make you travel all around the world:
1) Travel Writer
2) Work On A Yacht / Cruise Ship
3) Blogging
4) Flight attendant
5) Marketing/PR
6) Video work/vlogging
7) Computer programmer
8) Travel nurse
9) Freelance translator
10) Work At Backpacker Hostels.

You must select this all by yourself, both streams are really good and both are providing fancy packages to the students. So, it's totally upto you which one do you select.

After reading your question, what I thought is you are very much confused of what exactly you want to do. But yes, if you are interested towards MBA, yes, you can pursue it any time when we you wish to. Even I'm doing job since last 2 years and now, I have taken admission in a MBA college and will join there from June onwards.

For MBA, TERii College Kurukshetra can be a good and affordable option. The college also has good associations and facilities to enhance skills. There may not be a need of CAT high score as well. www.terii.in
or explore options near Kolkata if not willing to relocate. Try Amity Kolkata. Amity has its own selection processes and may be possible.

For MBA, TERii College Kurukshetra can be a good and affordable option. The college also has good associations and facilities to enhance skills. There may not be a need of CAT high score as well. www.terii.in
or explore options near Kolkata if not willing to relocate. Try Amity Kolkata. Amity has its own selection processes and may be possible.

After competing business design roles offered are mainly regarding planning and creating prototypes of business model, designing it's structure and layouts. It may be in Marketing or operations which depends on your interest. PGDM in BD is a good choice but you can also look for other demanding PGDM courses.
All the best!