Colleges in Pune

Hi Diksha!
Symbiosis Institute of Design is one of the oldest and premium institutes in India. The institute has an exceptional faculty and quality education. The placement cell of the institute is also very active and has helped students to be placed in some of the highly reputed organizations with

As you get admission in PUMBA, you become eligible to apply foe hostel facility in Pune University.
Almost everyone gets accommodation in University hostel, rarely one doesn't get.
The fee for hostel are also very negligible. So, don't worry about the charges as well.

No. PUMBA will not accept ATMA score.
The reason is not known and its a decision from DTE.

Visit this link:
dtemaharashtra.gov.in
You should visit this website frequently to be updated with all the dates. DTE publishes a schedule at the beginning of the process with all the dates, so look for that schedule once the process begins.

Its difficult to say you'll get the admission or not. But, I'll suggest you to apply, you have a chance.

Require minimum of 60% aggregate and 60% in PCM as well.

Depends on your JEE Mains marks, as admission are purely based on JEE Mains AIR.