Bachelors

Once you complete your Bachelor's degree, you are eligible for Masters in hotel management.

Yes you must have to clear the entrance exam for gaining undergraduate degree. many institutes have thier own individual exams like NIFT/NID ETC.

Unfortunately, not possible to study in Stanford University without appearing in SAT and TOEFL.

Yes, definitely. I am doing it.

Below mentioned are the top colleges for Bachelors in management studies:
1. NMIMS.
2. KJ Somaiya.
3. Xaviers.

Yes, you are eligible for executive MBA, because you already have 5 years of experience, so go for that.
All the best.

From which country would you like to study?

Hi Aryan,
European universities are overall affordable, check the fee structure on the university websites for fee details. US is expensive. You can check the following -
Freie Universitaet Berlin
Universit Paris 1 Panthon-Sorbonne
KU Leuven
Sapienza University of Rome
Alma Mater Studiorum - University of Bologna
City University of New York
Laval University
University of Alabama etc.