Medical College

It depends on your caste category and the state under which your medical college comes.
At my time (till 2 years ago), it was around 22,000 rupees per year tuition fee and few hundred rupees as extra fees (college related expenses) for an open category student.
For an OBC, it was about 2,000 rupees per year.
For SC, ST, NT and similar category, it was almost free (few hundred or so for college related expenses).
As far as I know, now the fees have doubled.
Also, the hostel fee was also negligible, about 5-6 thousand rupees a year.

With 50K rank, you won't get MBBS seat via merit anywhere in India. So, please prepare hard and try next year. If not, look at the alternative career options.
Regards.

There are over 17 MBBS Colleges in India Offering 17 Courses which accept NEET scores. Please refer to the link provided below for a list of these colleges. You should be able to navigate to a college of your choice using the filters on the web page. Regards. https://www.shiksha.com/medicine-health-sciences/colleges/mbbs-colleges-india?uaf[]=exam&ts=59388195&rf=filters&bc[]=102&ex[]=6246.

King George's Medical University (KGMU), Lucknow
Diploma in Radiodiagnosis
Lala Lajpat Rai Memorial Medical College (LLRMC), Meerut
Motilal Nehru Medical College (MLNMC)
Era's Lucknow Medical College and Hospital, Lucknow.

Can you share your percentage? Private medical college is very costly.

With this rank, I suppose getting an average MBBS college would be not possible. You will have to check for the management quota.